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description Publicationkeyboard_double_arrow_right Report , Article 2021 Slovenia, CroatiaPublisher:University of Ljubljana Authors: Blaženka Bukač; Marijan Grgić; Tomislav Bašić;Blaženka Bukač; Marijan Grgić; Tomislav Bašić;Ice-sheet mass balance and ice behaviour have been effectively monitored remotely by space-borne laser ranging technology, i.e. satellite laser altimetry, and/or satellite gravimetry. ICES atmission launched in 2003 has pioneered laser altimetry providing a large amount of elevation data related to ice sheet change with high spatial and temporal resolution. ICESat-2, the successor to the ICESat mission, was launched in 2018, continuing the legacy of its predecessor. This paper presents an overview of the satellite laser altimetry and a review of Greenland ice sheet change estimated from ICESat data and compared against estimates derived from satellite gravimetry, i.e. changes of the Earthʹs gravity field obtained from the GRACE data. In addition to that, it provides an insight into the characteristics and possibilities of ice sheet monitoring with renewed mission ICESat-2, which was compared against ICESat for the examination of ice height changes on the Jakobshavn glacier. ICESat comparison (2004-2008) shows that an average elevation change in different areas on Greenland varies up to 0.60 m yr1. Islandʹs coastal southern regions are most affected by ice loss, while inland areas record near-balance state. In the same period, gravity anomaly measurements showed negative annual mass balance trends in coastal regions ranging from a few cm up to -0.36 m yr-1 w.e. (water equivalent), while inland records show slightly positive trends. According to GRACE observations, in the following years (2009-2017), negative annual mass balance trends on the coast continued. Obseg ledenikov in spremembe v njihovi masi je mogoče učinkovito spremljati s tehnologijo laserskega satelitskega daljinskega zaznavanja, to je s satelitskim laserskim višinomerstvom, in/ali satelitsko gravimetrijo. ICESat, ki je bil izstreljen leta 2003, je prvi satelit za lasersko višinomerstvo, s katerim je zbranih mnogo podatkov o višinah na površju Zemlje z visoko časovno in prostorsko ločljivostjo, kar se uporablja tudi za spremljanje ledenikov. ICESat-2 je bil izstreljen leta 2018. Na primeru Grenlandije podajamo oceno o spreminjanju njenega ledenega pokrova na podlagi podatkov ICESat, kar primerjamo z ocenami o spremembi ledeniške mase na podlagi sprememb težnostnega polja na tem območju z uporabo podatkov satelita za spremljanje težnostnega polja Zemlje GRACE. Analiza podatkov ICESat za obdobje 2004-2008 kaže, da je povprečna sprememba višine ledu na Grenlandiji 0,60 m na leto. Večje izgube mase ledu so zaznavne na južnih obalnih predelih otoka, v notranjosti otoka v tem obdobju spremembe v masi ledenega pokrova skoraj niso nezaznavne. Za isto obdobje so tudi gravitacijski satelitski podatki pokazali, da ustrezajo spremembe težnostnega polja spremembi v masi ledenega pokrova na južni obali Grenlandije od nekaj centimetrov do 0,36 metrov vodnega ekvivalenta na leto (angl. water equivalent per year), medtem ko spremembe v masni bilanci v notranjosti otoka kažejo pozitivni trend. Na podlagi podatkov GRACE se tudi v obdobju 2009-2017 kaže negativni trend letne masne bilance ledenikov na obalnih območjih.
Repository of the Un... arrow_drop_down Repository of the University of LjubljanaReport . 2021License: CC BYData sources: Repository of the University of LjubljanaGeodetski Vestnik; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2021 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Repository of the Un... arrow_drop_down Repository of the University of LjubljanaReport . 2021License: CC BYData sources: Repository of the University of LjubljanaGeodetski Vestnik; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2021 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Report , Preprint 2019 Germany, Italy, Finland, Italy, Italy, Italy, Croatia, Spain, Italy, Italy, Italy, Spain, ItalyPublisher:EDP Sciences Funded by:NSF | Multi-wavelength Observat..., NSF | The Radio-Fermi Connectio...NSF| Multi-wavelength Observations of Gamma-Ray Blazars - the GLAST Connection ,NSF| The Radio-Fermi Connection: A Critical Study of Relativistic JetsMAGIC Collaboration; Acciari, V. A.; Ansoldi, S.; ANTONELLI, Lucio Angelo; Arbet Engels, A.; Baack, D.; Babić, A.; Banerjee, B.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; BIGONGIARI, Ciro; Biland, A.; Blanch, O.; Bonnoli, G.; Carosi, R.; Ceribella, G.; Cikota, S.; Colak, S. M.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; COVINO, Stefano; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; di Pierro, F.; Do Souto Espiñera, E.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Einecke, S.; Elsaesser, D.; Fallah Ramazani, V.; Fattorini, A.; Fernández-Barral, A.; Ferrara, G.; Fidalgo, D.; Foffano, L.; Fonseca, M. V.; Font, L.; Fruck, C.; Galindo, D.; GALLOZZI, Stefano; García López, R. J.; Garczarczyk, M.; Gaug, M.; Giammaria, P.; Godinović, N.; Guberman, D.; Hadasch, D.; Hahn, A.; Hassan, T.; Herrera, J.; Hoang, J.; Hrupec, D.; Inoue, S.; Ishio, K.; Iwamura, Y.; Kubo, H.; Kushida, J.; Kuveždić, D.; LAMASTRA, Alessandra; Lelas, D.; LEONE, FRANCESCO; Lindfors, E.; LOMBARDI, Saverio; Longo, F.; López, M.; López-Oramas, A.; Maggio, C.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Masuda, S.; Mazin, D.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Moreno, V.; Moretti, E.; Munar-Adrover, P.; Neustroev, V.; Niedzwiecki, A.; Nievas Rosillo, M.; Nigro, C.; Nilsson, K.; Ninci, D.; Nishijima, K.; Noda, K.; Nogués, L.; Nöthe, M.; PAIANO, Simona; Palacio, J.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pedaletti, G.; Peñil, P.; Peresano, M.; PERSIC, Massimo; Prada Moroni, P. G.; PRANDINI, ELISA; Puljak, I.; Garcia, J. R.; Rhode, W.; Ribó, M.; Rico, J.; Righi, Chiara; Rugliancich, A.; Saha, L.; Saito, T.; Satalecka, K.; Schweizer, T.; Sitarek, J.; Šnidarić, I.; Sobczynska, D.; Somero, A.; STAMERRA, Antonio; Strzys, M.; Surić, T.; TAVECCHIO, Fabrizio; Temnikov, P.; Terzić, T.; Teshima, M.; Torres-Albà, N.; Tsujimoto, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Vovk, I.; Will, M.; Zarić, D.; D'AMMANDO, FILIPPO; Hada, K.; Jorstad, S.; Marscher, A. P.; Mobeen, M. Z.; Hovatta, T.; Larionov, V. M.; Borman, G. A.; Grishina, T. S.; Kopatskaya, E. N.; Morozova, D. A.; Nikiforova, A. A.; Lähteenmäki, A.; Tornikoski, M.; Agudo, I.;handle: 20.500.14352/13401 , 10261/189635 , 11365/1082108 , 11368/2950746 , 20.500.11769/386850 , 11390/1148595
The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA 2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA201569210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662C2-2-P, FPA201790566REDC), the Indian Department of Atomic Energy and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia >Severo Ochoa> SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia >Maria de Maeztu> MDM-20140369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The work of the author M. Vazquez Acosta is financed with grant RYC-2013-14660 of MINECO. F. D'Ammando is grateful for support from the National Research Council of Science and Technology, Korea (EU16-001). The Fermi-LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. Based on observations made with the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10-10 photons cm-2 s-1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations. © ESO 2019. Acquisition and reduction of the MAPCAT data was supported in part by MINECO through grants AYA201014844, AYA2013-40825-P, and AYA2016-80889-P, and by the Regional Government of Andalucia through grant P09-FQM-4784. The MAPCAT observations were carried out at the German-Spanish Calar Alto Observatory, which is jointly operated by the Max-Plank-Institut fur Astronomie and the Instituto de Astrofisica de Andalucia-CSIC. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. This publication makes use of data obtained at the Metsahovi Radio Observatory, operated by Aalto University, Finland. This study makes use of 43-GHz VLBA data from the VLBA-BU Blazar Monitoring Program (VLBA-BUBLAZAR; http://www.bu.edu/blazars/VLBAproject.html), funded by NASA through the Fermi Guest Investigator Program. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated by Associated Universities, Inc. The BU group acknowledges support from NASA Fermi GI program grant 80NSSC17K0694 and US National Science Foundation grant AST-1615796. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. Peer Reviewed
IRIS - Università de... arrow_drop_down IRIS - Università degli Studi di Catania; Astronomy and Astrophysics; Archivio istituzionale della ricerca - Università degli Studi di Udine; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2019 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing PolicyAstronomy and Astrophysics; Usiena air - Università di SienaArticle . 2019Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2019Recolector de Ciencia Abierta, RECOLECTAArticle . 2019 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTAIRIS - Università degli Studi di CataniaArticle . 2019Data sources: IRIS - Università degli Studi di CataniaAaltodoc Publication ArchiveArticle . 2019 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2019Data sources: Archivio della Ricerca - Università di PisaUniversity of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2019 . Peer-reviewedOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2019Data sources: OA@INAF - Istituto Nazionale di Astrofisicaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 24 citations 24 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 35visibility views 35 download downloads 50 Powered bymore_vert IRIS - Università de... arrow_drop_down IRIS - Università degli Studi di Catania; Astronomy and Astrophysics; Archivio istituzionale della ricerca - Università degli Studi di Udine; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2019 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing PolicyAstronomy and Astrophysics; Usiena air - Università di SienaArticle . 2019Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2019Recolector de Ciencia Abierta, RECOLECTAArticle . 2019 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTAIRIS - Università degli Studi di CataniaArticle . 2019Data sources: IRIS - Università degli Studi di CataniaAaltodoc Publication ArchiveArticle . 2019 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2019Data sources: Archivio della Ricerca - Università di PisaUniversity of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2019 . Peer-reviewedOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2019Data sources: OA@INAF - Istituto Nazionale di Astrofisicaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Report , Preprint 2017 Switzerland, United States, Italy, Germany, Italy, Finland, Spain, Italy, Ireland, Germany, Italy, Croatia, Italy, Italy, ItalyPublisher:EDP Sciences Publicly fundedFunded by:NSERC, AKA | High energy blazar astron..., SFI | Probing the Extragalactic... +2 projectsNSERC ,AKA| High energy blazar astronomy ,SFI| Probing the Extragalactic Background Light with TeV Blazars ,AKA| Planck science in Metsähovi and Tuorla / Consortium: MeTuPlanck ,NSF| Multi-wavelength Observations of Gamma-Ray Blazars - the GLAST ConnectionMax Ludwig Ahnen; Louis Antonelli; P. Antoranz; Ana Babić; U. Barres de Almeida; Juan Abel Barrio; Elisa Bernardini; A. Berti; B. Biasuzzi; Oscar Blanch; F. Borracci; Thomas Bretz; Alessandro Carosi; Pierre Colin; E. Colombo; Jose Luis Contreras; Juan Cortina; Stefano Covino; P. Da Vela; Francesco Dazzi; A. De Angelis; E. de Ona Wilhelmi; M. Doert; Aaron Dominguez; Daniela Dorner; Michele Doro; Sabrina Einecke; D. Eisenacher Glawion; M. Engelkemeier; V. Fallah Ramazani; A. Fernández-Barral; M. V. Fonseca; Ll. Font; K. Frantzen; C. Fruck; R. J. García López; Markus Garczarczyk; D. Garrido Terrats; M. Gaug; P. Giammaria; Nikola Godinovic; A. González Muñoz; Dariusz Gora; D. Hadasch; Y. Hanabata; J. Herrera; J. Hose; Dario Hrupec; K. Kodani; Yusuke Konno; J. Kushida; Damir Lelas; Saverio Lombardi; Francesco Longo; M. A. Lopez; Ruben Lopez-Coto; Pratik Majumdar; M. Makariev; K. Mallot; Marina Manganaro; Karl Mannheim; L. Maraschi; Mosè Mariotti; M. I. Martínez; Daniel Mazin; U. Menzel; Jose Miguel Miranda; Razmik Mirzoyan; Abelardo Moralejo; D. Nakajima; Vitaly Neustroev; A. Niedzwiecki; M. Nievas Rosillo; Kari Nilsson; K. Nishijima; Koji Noda; A.-K. Overkemping; S. Paiano; M. Palatiello; David Paneque; Riccardo Paoletti; J. M. Paredes; L. Perri; Massimo Persic; Juri Poutanen; P. G. Prada Moroni; E. Prandini; I. Reichardt; Wolfgang Rhode; Marc Ribó; J. Rico; J. Rodriguez Garcia; Takashi Saito; S. Schröder; C. Schultz; S. N. Shore; A. Sillanpää; Julian Sitarek; I. Snidaric; Dorota Sobczyńska; Antonio Stamerra; L. O. Takalo; Fabrizio Tavecchio; P. Temnikov; Tomislav Terzić; D. Tescaro; Diego F. Torres; T. Toyama; A. Treves; Ievgen Vovk; J. E. Ward; Anushka Udara Abeysekara; S. Archambault; Wystan Benbow; Ralph Bird; M. Buchovecky; J. H. Buckley; M. P. Connolly; Wei Cui; Hugh Dickinson; Abraham D. Falcone; J. P. Finley; H. Fleischhack; A. Flinders; Lucy Fortson; G. H. Gillanders; S. Griffin; J. Grube; D. S. Hanna; P. Kaaret; P. Kar; N. Kelley-Hoskins; David Kieda; Maria Krause; M. J. Lang; Gernot Maier; R. Mukherjee; Daniel Nieto; S. O'Brien; R. A. Ong; N. H. Park; A. Pichel; Martin Pohl; John L. Quinn; K. Ragan; P. T. Reynolds; Gordon T. Richards; E. Roache; Adrian Rovero; C. Rulten; I. Sadeh; Marcos Santander; G. H. Sembroski; Karlen Shahinyan; I. Telezhinsky; J. Tyler; S. P. Wakely; Amanda Weinstein; P. Wilcox; A. Wilhelm; David A. Williams; Soebur Razzaque; C. M. Raiteri; Margo F. Aller; Valeri M. Larionov; Arkady A. Arkharov; Dmitry A. Blinov; N. V. Efimova; Vladimir A. Hagen-Thorn; Evgenia N. Kopatskaya; L. V. Larionova; Elena G. Larionova; Daria A. Morozova; R. Ligustri; P. Calcidese; G. N. Kimeridze; R. A. Chigladze; Wen Ping Chen; Ekaterina Koptelova; Joseph Moody; R. Pearson; A. Carraminyana; E. De la Fuente; Paul S. Smith; Mark Gurwell; C. Pagani; M. Capalbi; A. Cesarini; Yuri Y. Kovalev; Yu. A. Kovalev; Eduardo Ros; Alexander B. Pushkarev; Matthew L. Lister; Kirill Sokolovsky; G. Piner; Anne Lähteenmäki; Merja Tornikoski; Emmanouil Angelakis; Thomas P. Krichbaum; I. Nestoras; Lars Fuhrmann; J. A. Zensus; P. Cassaro; Andrea Orlati; G. Maccaferri; P. Leto; Marcello Giroletti; J. L. Richards; Walter Max-Moerbeck; Anthony C. S. Readhead;handle: 11365/1043526 , 20.500.14352/18343 , 11390/1126351 , 11368/2910040 , 11568/883092
We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1, which includes, among other instruments, MAGIC, VERITAS, Whipple 10 m, and Fermi-LAT to cover the γ-ray range from 0.1 GeV to 20 TeV; RXTE and Swift to cover wavelengths from UV tohard X-rays; and GASP-WEBT, which provides coverage of radio and optical wavelengths. Optical polarization measurements were provided for a fraction of the campaign by the Steward and St. Petersburg observatories. We evaluate the variability of the source and interband correlations, the γ-ray flaring activity occurring in May 2009, and interpret the results within two synchrotron self-Compton (SSC) scenarios. Aims. The multiband variability observed during the full campaign is addressed in terms of the fractional variability, and the possible correlations are studied by calculating the discrete correlation function for each pair of energy bands where the significance was evaluated with dedicated Monte Carlo simulations. The space of SSC model parameters is probed following a dedicated grid-scan strategy, allowing for a wide range of models to be tested and offering a study of the degeneracy of model-to-data agreement in the individual model parameters, hence providing a less biased interpretation than the “single-curve SSC model adjustment” typically reported in the literature. Methods. We find an increase in the fractional variability with energy, while no significant interband correlations of flux changes are found on the basis of the acquired data set. The SSC model grid-scan shows that the flaring activity around May 22 cannot be modeled adequately with a one-zone SSC scenario (using an electron energy distribution with two breaks), while it can be suitably described within a two (independent) zone SSC scenario. Here, one zone is responsible for the quiescent emission from the averaged 4.5-month observing period, while the other one, which is spatially separated from the first, dominates the flaring emission occurring at X-rays and very-high-energy (>100 GeV, VHE) γ rays. The flaring activity from May 1, which coincides with a rotation of the electric vector polarization angle (EVPA), cannot be satisfactorily reproduced by either a one-zone or a two-independent-zone SSC model, yet this is partially affected by the lack of strictly simultaneous observations and the presence of large flux changes on sub-hour timescales (detected at VHE γ rays). Results. The higher variability in the VHE emission and lack of correlation with the X-ray emission indicate that, at least during the 4.5-month observing campaign in 2009, the highest energy (and most variable) electrons that are responsible for the VHE γ rays do not make a dominant contribution to the ~1 keV emission. Alternatively, there could be a very variable component contributing to the VHE γ-ray emission in addition to that coming from the SSC scenario. The studies with our dedicated SSC grid-scan show that there is some degeneracy in both the one-zone and the two-zone SSC scenarios probed, with several combinations of model parameters yielding a similar model-to-data agreement, and some parameters better constrained than others. The observed γ-ray flaring activity, with the EVPA rotation coincident with the first γ-ray flare, resembles those reported previously for low frequency peaked blazars, hence suggesting that there are many similarities in the flaring mechanisms of blazars with different jet properties. Astronomy and astrophysics 603, A31 (2017). doi:10.1051/0004-6361/201629540 Published by EDP Sciences, Les Ulis
Archivio della Ricer... arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2017Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAaltodoc Publication ArchiveArticle . 2017 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaRecolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTARecolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Infoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsCroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIPublikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamhttps://doi.org/10.48550/arxiv...Article . 2016License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 49 citations 49 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 1visibility views 1 Powered bymore_vert Archivio della Ricer... arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2017Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAaltodoc Publication ArchiveArticle . 2017 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaRecolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTARecolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Infoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsCroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIPublikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamhttps://doi.org/10.48550/arxiv...Article . 2016License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Report , Preprint 2017 Croatia, Italy, Italy, Italy, Germany, Italy, Switzerland, Italy, Italy, SpainPublisher:EDP Sciences Max Ludwig Ahnen; Stefano Ansoldi; L. A. Antonelli; P. Antoranz; C. Arcaro; Ana Babić; B. Banerjee; P. Bangale; U. Barres de Almeida; Juan Abel Barrio; J. Becerra González; Wlodek Bednarek; Elisa Bernardini; Alessio Berti; B. Biasuzzi; Adrian Biland; Oscar Blanch; S. Bonnefoy; Giacomo Bonnoli; F. Borracci; Thomas Bretz; Rodolfo Carosi; Alessandro Carosi; Arka Chatterjee; Pierre Colin; E. Colombo; Jose Luis Contreras; Juan Cortina; Stefano Covino; P. Cumani; P. Da Vela; Francesco Dazzi; A. De Angelis; B. De Lotto; E. de Oña Wilhelmi; F. Di Pierro; M. Doert; Aaron Dominguez; D. Dominis Prester; Daniela Dorner; Michele Doro; Sabrina Einecke; D. Eisenacher Glawion; D. Elsaesser; M. Engelkemeier; V. Fallah Ramazani; A. Fernández-Barral; D. Fidalgo; M. V. Fonseca; Ll. Font; K. Frantzen; C. Fruck; D. Galindo; R. J. García López; M. Garczarczyk; D. Garrido Terrats; M. Gaug; P. Giammaria; Nikola Godinovic; Dariusz Gora; D. Guberman; D. Hadasch; Alexander Hahn; M. Hayashida; J. Herrera; J. Hose; Dario Hrupec; Gareth Hughes; W. Idec; K. Kodani; Yusuke Konno; Hidetoshi Kubo; J. Kushida; A. La Barbera; Damir Lelas; Elina Lindfors; Saverio Lombardi; Francesco Longo; M. A. Lopez; Ruben Lopez-Coto; Pratik Majumdar; Martin Makariev; K. Mallot; G. Maneva; Marina Manganaro; Karl Mannheim; L. Maraschi; Benito Marcote; Mosè Mariotti; M. I. Martínez; Daniel Mazin; U. Menzel; Jose Miguel Miranda; R. Mirzoyan; Abelardo Moralejo; E. Moretti; D. Nakajima; Vitaly Neustroev; A. Niedzwiecki; M. Nievas Rosillo; Kari Nilsson; Kyoshi Nishijima; Koji Noda; L. Nogués; S. Paiano; J. Palacio; M. Palatiello; David Paneque; Riccardo Paoletti; J. M. Paredes; X. Paredes-Fortuny; G. Pedaletti; M. Peresano; L. Perri; Massimo Persic; Juri Poutanen; P. G. Prada Moroni; E. Prandini; Ivica Puljak; J. R. Garcia; I. Reichardt; Wolfgang Rhode; Marc Ribó; J. Rico; Takashi Saito; Konstancja Satalecka; S. Schroeder; T. Schweizer; A. Sillanpää; Julian Sitarek; I. Snidaric; Dorota Sobczyńska; Antonio Stamerra; Marcel Strzys; T. Surić; L. O. Takalo; Fabrizio Tavecchio; P. Temnikov; Tomislav Terzić; D. Tescaro; Masahiro Teshima; Diego F. Torres; T. Toyama; A. Treves; Gaia Vanzo; M. Vazquez Acosta; Ievgen Vovk; J. E. Ward; M. Will; M. H. Wu; R. Zanin;handle: 11365/1042606 , 20.500.14352/18340 , 11368/2910046 , 11568/883100 , 11390/1126313
In this work we present data from observations with the MAGIC telescopes of SN 2014J detected on January 21 2014, the closest Type Ia supernova since Imaging Air Cherenkov Telescopes started to operate.Aims. We aim to probe the possibility of very-high-energy (VHE; E ≥ 100 GeV) gamma rays produced in the early stages of Type Ia supernova explosions.Methods. We performed follow-up observations after this supernova (SN) explosion for five days, between January 27 and February 2 2014. We searched for gamma-ray signals in the energy range between 100 GeV and several TeV from the location of SN 2014J using data from a total of ~5.5 h of observations. Prospects for observing gamma rays of hadronic origin from SN 2014J in the near future are also being addressed.Results. No significant excess was detected from the direction of SN 2014J. Upper limits at 95% confidence level on the integral flux, assuming a power-law spectrum, dF/dE ∝ E− Γ, with a spectral index of Γ = 2.6, for energies higher than 300 GeV and 700 GeV, are established at 1.3 × 10$^{-12}$ and 4.1 × 10$^{-13}$ photons cm$^{-2}$ s$^{-2}$, respectively.Conclusions. For the first time, upper limits on the VHE emission of a Type Ia supernova are established. The energy fraction isotropically emitted into TeV gamma rays during the first ~ 10 days after the supernova explosion for energies greater than 300 GeV is limited to 10$^{-6}$ of the total available energy budget (~1051 erg). Within the assumed theoretical scenario, the MAGIC upper limits on the VHE emission suggest that SN 2014J will not be detectable in the future by any current or planned generation of Imaging Atmospheric Cherenkov Telescopes. Astronomy and astrophysics 602, A98 (2017). doi:10.1051/0004-6361/201629574 Published by EDP Sciences, Les Ulis
E-Prints Complutense arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaarXiv.org e-Print Archive; OpenAIREPreprint . 2017Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Recolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTACroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationshttps://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!more_vert E-Prints Complutense arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaarXiv.org e-Print Archive; OpenAIREPreprint . 2017Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Recolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTACroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationshttps://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type 2016 Slovenia, Croatia EnglishAuthors: Kovačič, Boštjan; Pribičević, Boško; Kamnik, Rok;Kovačič, Boštjan; Pribičević, Boško; Kamnik, Rok;Displacement research using the three-dimensional global navigation satellite system (GNSS) as part of geodetic monitoring is becoming the key investigation for establishing a cause-and-effect relationships model between external natural factors, on the one hand, and the criteria that describes the level of functionality and safety of the observed natural or artificial object, on the other, in cases of motion of an object in space and time. The main objective of the deformation analysis is to confirm the stabilities of the reference points of a geodetic network, which are used to determine the movements of the control points that are stabilized on the observed objects. The assumption about the stabilities of certain reference points must be based on reasonable grounds, underpinned by measurements and proven by numerical methods. This is one part of the results of the deformation analysis when determining the extent of the movements and deformations. To do this a transformation is used in which a comparison is made between the coordinates of the points for two separate epochs. On the basis of the estimated transformation parameters, possible movements can be concluded within the reference points, i.e., on whether the datum parameters have changed. After confirming the stability of the geodetic network the coordinate differences of identical points measured within the different time windows can be determined as displacements and/or deformations of an object. In this paper one viaduct was assessed through geology and tectonic activities and also a load test of the viaduct was performed. The viaduct is in a quite active region, but the load test showed that the bridge response to the load is as expected. Spremljanje pomikov s pomočjo tridimenzionalnih globalnih navigacijskih satelitskih metod (GNSS), ki so del geodetskih metod, postajajo ključne preiskave pri ugotavljanju modelov vzrokov in posledic med zunanjimi naravnimi vplivi na eni in kriteriji, ki opisujejo nivo funkcionalnosti in varnosti naravnega ali zgrajenega objekta na drugi strani v primerih pomikov v prostoru in času. Glavni cilj deformacijske analize je potrditi stabilnost referenčnih točk geodetske mreže. Uporablja se za določitev pomikov kontrolnih točk, ki so stabilizirane na opazovanem objektu. Domneva o stabilnosti določenih referenčnih točk mora temeljiti na trdnih dokazih skozi meritve in biti potrjena skozi numerične metode. To je en del deformacijske analize takrat ko določamo vrednosti pomikov in deformacij. Za to je potrebna transformacija, pri kateri se izvede primerjava med koordinatami istih točk v dveh različnih časovnih epohah. Na osnovi ocenjenih transformacijskih parametrov se lahko sklepa o možnih pomikih znotraj referenčnih točk še posebej ali so se spremenili datumski parametri. Po potrditvi stabilnosti geodetske mreže se lahko določijo koordinatne razlike identičnih točk merjenih v različnih časovnih okvirjih, ki se lahko nato opredelijo kot pomiki in/ali deformacije opazovanega objekta. V članku je podana ocena viadukta glede na geologijo in tektonske aktivnosti pa tudi glede na izveden obremenilni preizkus. Viadukt je lociran na precej aktivnem območju, obremenilni preizkus pa je pokazal, da se objekt na zunanjo obtežbo obnaša v skladu s pričakovanji.
Digital library of U... arrow_drop_down Digital library of University of MariborReport . 2018Data sources: Digital library of University of MariborCroatian Scientific Bibliography - CROSBIOther literature type . 2016Data sources: Croatian Scientific Bibliography - CROSBIAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1857::b0081e04d82a12bc24a017d611b55187&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Digital library of U... arrow_drop_down Digital library of University of MariborReport . 2018Data sources: Digital library of University of MariborCroatian Scientific Bibliography - CROSBIOther literature type . 2016Data sources: Croatian Scientific Bibliography - CROSBIAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1857::b0081e04d82a12bc24a017d611b55187&type=result"></script>'); --> </script>
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description Publicationkeyboard_double_arrow_right Report , Article 2021 Slovenia, CroatiaPublisher:University of Ljubljana Authors: Blaženka Bukač; Marijan Grgić; Tomislav Bašić;Blaženka Bukač; Marijan Grgić; Tomislav Bašić;Ice-sheet mass balance and ice behaviour have been effectively monitored remotely by space-borne laser ranging technology, i.e. satellite laser altimetry, and/or satellite gravimetry. ICES atmission launched in 2003 has pioneered laser altimetry providing a large amount of elevation data related to ice sheet change with high spatial and temporal resolution. ICESat-2, the successor to the ICESat mission, was launched in 2018, continuing the legacy of its predecessor. This paper presents an overview of the satellite laser altimetry and a review of Greenland ice sheet change estimated from ICESat data and compared against estimates derived from satellite gravimetry, i.e. changes of the Earthʹs gravity field obtained from the GRACE data. In addition to that, it provides an insight into the characteristics and possibilities of ice sheet monitoring with renewed mission ICESat-2, which was compared against ICESat for the examination of ice height changes on the Jakobshavn glacier. ICESat comparison (2004-2008) shows that an average elevation change in different areas on Greenland varies up to 0.60 m yr1. Islandʹs coastal southern regions are most affected by ice loss, while inland areas record near-balance state. In the same period, gravity anomaly measurements showed negative annual mass balance trends in coastal regions ranging from a few cm up to -0.36 m yr-1 w.e. (water equivalent), while inland records show slightly positive trends. According to GRACE observations, in the following years (2009-2017), negative annual mass balance trends on the coast continued. Obseg ledenikov in spremembe v njihovi masi je mogoče učinkovito spremljati s tehnologijo laserskega satelitskega daljinskega zaznavanja, to je s satelitskim laserskim višinomerstvom, in/ali satelitsko gravimetrijo. ICESat, ki je bil izstreljen leta 2003, je prvi satelit za lasersko višinomerstvo, s katerim je zbranih mnogo podatkov o višinah na površju Zemlje z visoko časovno in prostorsko ločljivostjo, kar se uporablja tudi za spremljanje ledenikov. ICESat-2 je bil izstreljen leta 2018. Na primeru Grenlandije podajamo oceno o spreminjanju njenega ledenega pokrova na podlagi podatkov ICESat, kar primerjamo z ocenami o spremembi ledeniške mase na podlagi sprememb težnostnega polja na tem območju z uporabo podatkov satelita za spremljanje težnostnega polja Zemlje GRACE. Analiza podatkov ICESat za obdobje 2004-2008 kaže, da je povprečna sprememba višine ledu na Grenlandiji 0,60 m na leto. Večje izgube mase ledu so zaznavne na južnih obalnih predelih otoka, v notranjosti otoka v tem obdobju spremembe v masi ledenega pokrova skoraj niso nezaznavne. Za isto obdobje so tudi gravitacijski satelitski podatki pokazali, da ustrezajo spremembe težnostnega polja spremembi v masi ledenega pokrova na južni obali Grenlandije od nekaj centimetrov do 0,36 metrov vodnega ekvivalenta na leto (angl. water equivalent per year), medtem ko spremembe v masni bilanci v notranjosti otoka kažejo pozitivni trend. Na podlagi podatkov GRACE se tudi v obdobju 2009-2017 kaže negativni trend letne masne bilance ledenikov na obalnih območjih.
Repository of the Un... arrow_drop_down Repository of the University of LjubljanaReport . 2021License: CC BYData sources: Repository of the University of LjubljanaGeodetski Vestnik; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2021 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen gold 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Repository of the Un... arrow_drop_down Repository of the University of LjubljanaReport . 2021License: CC BYData sources: Repository of the University of LjubljanaGeodetski Vestnik; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2021 . Peer-reviewedadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Report , Preprint 2019 Germany, Italy, Finland, Italy, Italy, Italy, Croatia, Spain, Italy, Italy, Italy, Spain, ItalyPublisher:EDP Sciences Funded by:NSF | Multi-wavelength Observat..., NSF | The Radio-Fermi Connectio...NSF| Multi-wavelength Observations of Gamma-Ray Blazars - the GLAST Connection ,NSF| The Radio-Fermi Connection: A Critical Study of Relativistic JetsMAGIC Collaboration; Acciari, V. A.; Ansoldi, S.; ANTONELLI, Lucio Angelo; Arbet Engels, A.; Baack, D.; Babić, A.; Banerjee, B.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; BIGONGIARI, Ciro; Biland, A.; Blanch, O.; Bonnoli, G.; Carosi, R.; Ceribella, G.; Cikota, S.; Colak, S. M.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; COVINO, Stefano; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; di Pierro, F.; Do Souto Espiñera, E.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Einecke, S.; Elsaesser, D.; Fallah Ramazani, V.; Fattorini, A.; Fernández-Barral, A.; Ferrara, G.; Fidalgo, D.; Foffano, L.; Fonseca, M. V.; Font, L.; Fruck, C.; Galindo, D.; GALLOZZI, Stefano; García López, R. J.; Garczarczyk, M.; Gaug, M.; Giammaria, P.; Godinović, N.; Guberman, D.; Hadasch, D.; Hahn, A.; Hassan, T.; Herrera, J.; Hoang, J.; Hrupec, D.; Inoue, S.; Ishio, K.; Iwamura, Y.; Kubo, H.; Kushida, J.; Kuveždić, D.; LAMASTRA, Alessandra; Lelas, D.; LEONE, FRANCESCO; Lindfors, E.; LOMBARDI, Saverio; Longo, F.; López, M.; López-Oramas, A.; Maggio, C.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Masuda, S.; Mazin, D.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Moreno, V.; Moretti, E.; Munar-Adrover, P.; Neustroev, V.; Niedzwiecki, A.; Nievas Rosillo, M.; Nigro, C.; Nilsson, K.; Ninci, D.; Nishijima, K.; Noda, K.; Nogués, L.; Nöthe, M.; PAIANO, Simona; Palacio, J.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pedaletti, G.; Peñil, P.; Peresano, M.; PERSIC, Massimo; Prada Moroni, P. G.; PRANDINI, ELISA; Puljak, I.; Garcia, J. R.; Rhode, W.; Ribó, M.; Rico, J.; Righi, Chiara; Rugliancich, A.; Saha, L.; Saito, T.; Satalecka, K.; Schweizer, T.; Sitarek, J.; Šnidarić, I.; Sobczynska, D.; Somero, A.; STAMERRA, Antonio; Strzys, M.; Surić, T.; TAVECCHIO, Fabrizio; Temnikov, P.; Terzić, T.; Teshima, M.; Torres-Albà, N.; Tsujimoto, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Vovk, I.; Will, M.; Zarić, D.; D'AMMANDO, FILIPPO; Hada, K.; Jorstad, S.; Marscher, A. P.; Mobeen, M. Z.; Hovatta, T.; Larionov, V. M.; Borman, G. A.; Grishina, T. S.; Kopatskaya, E. N.; Morozova, D. A.; Nikiforova, A. A.; Lähteenmäki, A.; Tornikoski, M.; Agudo, I.;handle: 20.500.14352/13401 , 10261/189635 , 11365/1082108 , 11368/2950746 , 20.500.11769/386850 , 11390/1148595
The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA 2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA201569210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662C2-2-P, FPA201790566REDC), the Indian Department of Atomic Energy and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia >Severo Ochoa> SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia >Maria de Maeztu> MDM-20140369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The work of the author M. Vazquez Acosta is financed with grant RYC-2013-14660 of MINECO. F. D'Ammando is grateful for support from the National Research Council of Science and Technology, Korea (EU16-001). The Fermi-LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. Based on observations made with the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The mechanisms producing fast variability of the γ-ray emission in active galactic nuclei (AGNs) are under debate. The MAGIC telescopes detected a fast, very-high-energy (VHE, E > 100 GeV) γ-ray flare from BL Lacertae on 2015 June 15. The flare had a maximum flux of (1.5 ± 0.3) × 10-10 photons cm-2 s-1 and halving time of 26 ± 8 min. The MAGIC observations were triggered by a high state in the optical and high-energy (HE, E > 100 MeV) γ-ray bands. In this paper we present the MAGIC VHE γ-ray data together with multi-wavelength data from radio, optical, X-rays, and HE γ rays from 2015 May 1 to July 31. Well-sampled multi-wavelength data allow us to study the variability in detail and compare it to the other epochs when fast, VHE γ-ray flares have been detected from this source. Interestingly, we find that the behaviour in radio, optical, X-rays, and HE γ-rays is very similar to two other observed VHE γ-ray flares. In particular, also during this flare there was an indication of rotation of the optical polarization angle and of activity at the 43 GHz core. These repeating patterns indicate a connection between the three events. We also test modelling of the spectral energy distribution based on constraints from the light curves and VLBA observations, with two different geometrical setups of two-zone inverse Compton models. In addition we model the γ-ray data with the star-jet interaction model. We find that all of the tested emission models are compatible with the fast VHE γ-ray flare, but all have some tension with the multi-wavelength observations. © ESO 2019. Acquisition and reduction of the MAPCAT data was supported in part by MINECO through grants AYA201014844, AYA2013-40825-P, and AYA2016-80889-P, and by the Regional Government of Andalucia through grant P09-FQM-4784. The MAPCAT observations were carried out at the German-Spanish Calar Alto Observatory, which is jointly operated by the Max-Plank-Institut fur Astronomie and the Instituto de Astrofisica de Andalucia-CSIC. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. This publication makes use of data obtained at the Metsahovi Radio Observatory, operated by Aalto University, Finland. This study makes use of 43-GHz VLBA data from the VLBA-BU Blazar Monitoring Program (VLBA-BUBLAZAR; http://www.bu.edu/blazars/VLBAproject.html), funded by NASA through the Fermi Guest Investigator Program. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated by Associated Universities, Inc. The BU group acknowledges support from NASA Fermi GI program grant 80NSSC17K0694 and US National Science Foundation grant AST-1615796. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. Peer Reviewed
IRIS - Università de... arrow_drop_down IRIS - Università degli Studi di Catania; Astronomy and Astrophysics; Archivio istituzionale della ricerca - Università degli Studi di Udine; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2019 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing PolicyAstronomy and Astrophysics; Usiena air - Università di SienaArticle . 2019Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2019Recolector de Ciencia Abierta, RECOLECTAArticle . 2019 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTAIRIS - Università degli Studi di CataniaArticle . 2019Data sources: IRIS - Università degli Studi di CataniaAaltodoc Publication ArchiveArticle . 2019 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2019Data sources: Archivio della Ricerca - Università di PisaUniversity of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2019 . Peer-reviewedOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2019Data sources: OA@INAF - Istituto Nazionale di Astrofisicaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 24 citations 24 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 35visibility views 35 download downloads 50 Powered bymore_vert IRIS - Università de... arrow_drop_down IRIS - Università degli Studi di Catania; Astronomy and Astrophysics; Archivio istituzionale della ricerca - Università degli Studi di Udine; Croatian Scientific Bibliography - CROSBIOther literature type . Article . 2019 . Peer-reviewedLicense: EDP Sciences Copyright and Publication Licensing PolicyAstronomy and Astrophysics; Usiena air - Università di SienaArticle . 2019Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2019Recolector de Ciencia Abierta, RECOLECTAArticle . 2019 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTAIRIS - Università degli Studi di CataniaArticle . 2019Data sources: IRIS - Università degli Studi di CataniaAaltodoc Publication ArchiveArticle . 2019 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2019Data sources: Archivio della Ricerca - Università di PisaUniversity of Oulu Repository - JultikaArticle . 2019Data sources: University of Oulu Repository - JultikaRecolector de Ciencia Abierta, RECOLECTA; DIGITAL.CSICArticle . 2019 . Peer-reviewedOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2019Data sources: OA@INAF - Istituto Nazionale di Astrofisicaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Report , Preprint 2017 Switzerland, United States, Italy, Germany, Italy, Finland, Spain, Italy, Ireland, Germany, Italy, Croatia, Italy, Italy, ItalyPublisher:EDP Sciences Publicly fundedFunded by:NSERC, AKA | High energy blazar astron..., SFI | Probing the Extragalactic... +2 projectsNSERC ,AKA| High energy blazar astronomy ,SFI| Probing the Extragalactic Background Light with TeV Blazars ,AKA| Planck science in Metsähovi and Tuorla / Consortium: MeTuPlanck ,NSF| Multi-wavelength Observations of Gamma-Ray Blazars - the GLAST ConnectionMax Ludwig Ahnen; Louis Antonelli; P. Antoranz; Ana Babić; U. Barres de Almeida; Juan Abel Barrio; Elisa Bernardini; A. Berti; B. Biasuzzi; Oscar Blanch; F. Borracci; Thomas Bretz; Alessandro Carosi; Pierre Colin; E. Colombo; Jose Luis Contreras; Juan Cortina; Stefano Covino; P. Da Vela; Francesco Dazzi; A. De Angelis; E. de Ona Wilhelmi; M. Doert; Aaron Dominguez; Daniela Dorner; Michele Doro; Sabrina Einecke; D. Eisenacher Glawion; M. Engelkemeier; V. Fallah Ramazani; A. Fernández-Barral; M. V. Fonseca; Ll. Font; K. Frantzen; C. Fruck; R. J. García López; Markus Garczarczyk; D. Garrido Terrats; M. Gaug; P. Giammaria; Nikola Godinovic; A. González Muñoz; Dariusz Gora; D. Hadasch; Y. Hanabata; J. Herrera; J. Hose; Dario Hrupec; K. Kodani; Yusuke Konno; J. Kushida; Damir Lelas; Saverio Lombardi; Francesco Longo; M. A. Lopez; Ruben Lopez-Coto; Pratik Majumdar; M. Makariev; K. Mallot; Marina Manganaro; Karl Mannheim; L. Maraschi; Mosè Mariotti; M. I. Martínez; Daniel Mazin; U. Menzel; Jose Miguel Miranda; Razmik Mirzoyan; Abelardo Moralejo; D. Nakajima; Vitaly Neustroev; A. Niedzwiecki; M. Nievas Rosillo; Kari Nilsson; K. Nishijima; Koji Noda; A.-K. Overkemping; S. Paiano; M. Palatiello; David Paneque; Riccardo Paoletti; J. M. Paredes; L. Perri; Massimo Persic; Juri Poutanen; P. G. Prada Moroni; E. Prandini; I. Reichardt; Wolfgang Rhode; Marc Ribó; J. Rico; J. Rodriguez Garcia; Takashi Saito; S. Schröder; C. Schultz; S. N. Shore; A. Sillanpää; Julian Sitarek; I. Snidaric; Dorota Sobczyńska; Antonio Stamerra; L. O. Takalo; Fabrizio Tavecchio; P. Temnikov; Tomislav Terzić; D. Tescaro; Diego F. Torres; T. Toyama; A. Treves; Ievgen Vovk; J. E. Ward; Anushka Udara Abeysekara; S. Archambault; Wystan Benbow; Ralph Bird; M. Buchovecky; J. H. Buckley; M. P. Connolly; Wei Cui; Hugh Dickinson; Abraham D. Falcone; J. P. Finley; H. Fleischhack; A. Flinders; Lucy Fortson; G. H. Gillanders; S. Griffin; J. Grube; D. S. Hanna; P. Kaaret; P. Kar; N. Kelley-Hoskins; David Kieda; Maria Krause; M. J. Lang; Gernot Maier; R. Mukherjee; Daniel Nieto; S. O'Brien; R. A. Ong; N. H. Park; A. Pichel; Martin Pohl; John L. Quinn; K. Ragan; P. T. Reynolds; Gordon T. Richards; E. Roache; Adrian Rovero; C. Rulten; I. Sadeh; Marcos Santander; G. H. Sembroski; Karlen Shahinyan; I. Telezhinsky; J. Tyler; S. P. Wakely; Amanda Weinstein; P. Wilcox; A. Wilhelm; David A. Williams; Soebur Razzaque; C. M. Raiteri; Margo F. Aller; Valeri M. Larionov; Arkady A. Arkharov; Dmitry A. Blinov; N. V. Efimova; Vladimir A. Hagen-Thorn; Evgenia N. Kopatskaya; L. V. Larionova; Elena G. Larionova; Daria A. Morozova; R. Ligustri; P. Calcidese; G. N. Kimeridze; R. A. Chigladze; Wen Ping Chen; Ekaterina Koptelova; Joseph Moody; R. Pearson; A. Carraminyana; E. De la Fuente; Paul S. Smith; Mark Gurwell; C. Pagani; M. Capalbi; A. Cesarini; Yuri Y. Kovalev; Yu. A. Kovalev; Eduardo Ros; Alexander B. Pushkarev; Matthew L. Lister; Kirill Sokolovsky; G. Piner; Anne Lähteenmäki; Merja Tornikoski; Emmanouil Angelakis; Thomas P. Krichbaum; I. Nestoras; Lars Fuhrmann; J. A. Zensus; P. Cassaro; Andrea Orlati; G. Maccaferri; P. Leto; Marcello Giroletti; J. L. Richards; Walter Max-Moerbeck; Anthony C. S. Readhead;handle: 11365/1043526 , 20.500.14352/18343 , 11390/1126351 , 11368/2910040 , 11568/883092
We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1, which includes, among other instruments, MAGIC, VERITAS, Whipple 10 m, and Fermi-LAT to cover the γ-ray range from 0.1 GeV to 20 TeV; RXTE and Swift to cover wavelengths from UV tohard X-rays; and GASP-WEBT, which provides coverage of radio and optical wavelengths. Optical polarization measurements were provided for a fraction of the campaign by the Steward and St. Petersburg observatories. We evaluate the variability of the source and interband correlations, the γ-ray flaring activity occurring in May 2009, and interpret the results within two synchrotron self-Compton (SSC) scenarios. Aims. The multiband variability observed during the full campaign is addressed in terms of the fractional variability, and the possible correlations are studied by calculating the discrete correlation function for each pair of energy bands where the significance was evaluated with dedicated Monte Carlo simulations. The space of SSC model parameters is probed following a dedicated grid-scan strategy, allowing for a wide range of models to be tested and offering a study of the degeneracy of model-to-data agreement in the individual model parameters, hence providing a less biased interpretation than the “single-curve SSC model adjustment” typically reported in the literature. Methods. We find an increase in the fractional variability with energy, while no significant interband correlations of flux changes are found on the basis of the acquired data set. The SSC model grid-scan shows that the flaring activity around May 22 cannot be modeled adequately with a one-zone SSC scenario (using an electron energy distribution with two breaks), while it can be suitably described within a two (independent) zone SSC scenario. Here, one zone is responsible for the quiescent emission from the averaged 4.5-month observing period, while the other one, which is spatially separated from the first, dominates the flaring emission occurring at X-rays and very-high-energy (>100 GeV, VHE) γ rays. The flaring activity from May 1, which coincides with a rotation of the electric vector polarization angle (EVPA), cannot be satisfactorily reproduced by either a one-zone or a two-independent-zone SSC model, yet this is partially affected by the lack of strictly simultaneous observations and the presence of large flux changes on sub-hour timescales (detected at VHE γ rays). Results. The higher variability in the VHE emission and lack of correlation with the X-ray emission indicate that, at least during the 4.5-month observing campaign in 2009, the highest energy (and most variable) electrons that are responsible for the VHE γ rays do not make a dominant contribution to the ~1 keV emission. Alternatively, there could be a very variable component contributing to the VHE γ-ray emission in addition to that coming from the SSC scenario. The studies with our dedicated SSC grid-scan show that there is some degeneracy in both the one-zone and the two-zone SSC scenarios probed, with several combinations of model parameters yielding a similar model-to-data agreement, and some parameters better constrained than others. The observed γ-ray flaring activity, with the EVPA rotation coincident with the first γ-ray flare, resembles those reported previously for low frequency peaked blazars, hence suggesting that there are many similarities in the flaring mechanisms of blazars with different jet properties. Astronomy and astrophysics 603, A31 (2017). doi:10.1051/0004-6361/201629540 Published by EDP Sciences, Les Ulis
Archivio della Ricer... arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2017Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAaltodoc Publication ArchiveArticle . 2017 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaRecolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTARecolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Infoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsCroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIPublikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamhttps://doi.org/10.48550/arxiv...Article . 2016License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 49 citations 49 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!visibility 1visibility views 1 Powered bymore_vert Archivio della Ricer... arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaOA@INAF - Istituto Nazionale di AstrofisicaArticle . 2017Data sources: OA@INAF - Istituto Nazionale di AstrofisicaAaltodoc Publication ArchiveArticle . 2017 . Peer-reviewedData sources: Aaltodoc Publication ArchiveArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaRecolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTARecolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Infoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationsCroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIPublikationsserver der Universität PotsdamArticle . 2017Data sources: Publikationsserver der Universität Potsdamhttps://doi.org/10.48550/arxiv...Article . 2016License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Article , Other literature type , Report , Preprint 2017 Croatia, Italy, Italy, Italy, Germany, Italy, Switzerland, Italy, Italy, SpainPublisher:EDP Sciences Max Ludwig Ahnen; Stefano Ansoldi; L. A. Antonelli; P. Antoranz; C. Arcaro; Ana Babić; B. Banerjee; P. Bangale; U. Barres de Almeida; Juan Abel Barrio; J. Becerra González; Wlodek Bednarek; Elisa Bernardini; Alessio Berti; B. Biasuzzi; Adrian Biland; Oscar Blanch; S. Bonnefoy; Giacomo Bonnoli; F. Borracci; Thomas Bretz; Rodolfo Carosi; Alessandro Carosi; Arka Chatterjee; Pierre Colin; E. Colombo; Jose Luis Contreras; Juan Cortina; Stefano Covino; P. Cumani; P. Da Vela; Francesco Dazzi; A. De Angelis; B. De Lotto; E. de Oña Wilhelmi; F. Di Pierro; M. Doert; Aaron Dominguez; D. Dominis Prester; Daniela Dorner; Michele Doro; Sabrina Einecke; D. Eisenacher Glawion; D. Elsaesser; M. Engelkemeier; V. Fallah Ramazani; A. Fernández-Barral; D. Fidalgo; M. V. Fonseca; Ll. Font; K. Frantzen; C. Fruck; D. Galindo; R. J. García López; M. Garczarczyk; D. Garrido Terrats; M. Gaug; P. Giammaria; Nikola Godinovic; Dariusz Gora; D. Guberman; D. Hadasch; Alexander Hahn; M. Hayashida; J. Herrera; J. Hose; Dario Hrupec; Gareth Hughes; W. Idec; K. Kodani; Yusuke Konno; Hidetoshi Kubo; J. Kushida; A. La Barbera; Damir Lelas; Elina Lindfors; Saverio Lombardi; Francesco Longo; M. A. Lopez; Ruben Lopez-Coto; Pratik Majumdar; Martin Makariev; K. Mallot; G. Maneva; Marina Manganaro; Karl Mannheim; L. Maraschi; Benito Marcote; Mosè Mariotti; M. I. Martínez; Daniel Mazin; U. Menzel; Jose Miguel Miranda; R. Mirzoyan; Abelardo Moralejo; E. Moretti; D. Nakajima; Vitaly Neustroev; A. Niedzwiecki; M. Nievas Rosillo; Kari Nilsson; Kyoshi Nishijima; Koji Noda; L. Nogués; S. Paiano; J. Palacio; M. Palatiello; David Paneque; Riccardo Paoletti; J. M. Paredes; X. Paredes-Fortuny; G. Pedaletti; M. Peresano; L. Perri; Massimo Persic; Juri Poutanen; P. G. Prada Moroni; E. Prandini; Ivica Puljak; J. R. Garcia; I. Reichardt; Wolfgang Rhode; Marc Ribó; J. Rico; Takashi Saito; Konstancja Satalecka; S. Schroeder; T. Schweizer; A. Sillanpää; Julian Sitarek; I. Snidaric; Dorota Sobczyńska; Antonio Stamerra; Marcel Strzys; T. Surić; L. O. Takalo; Fabrizio Tavecchio; P. Temnikov; Tomislav Terzić; D. Tescaro; Masahiro Teshima; Diego F. Torres; T. Toyama; A. Treves; Gaia Vanzo; M. Vazquez Acosta; Ievgen Vovk; J. E. Ward; M. Will; M. H. Wu; R. Zanin;handle: 11365/1042606 , 20.500.14352/18340 , 11368/2910046 , 11568/883100 , 11390/1126313
In this work we present data from observations with the MAGIC telescopes of SN 2014J detected on January 21 2014, the closest Type Ia supernova since Imaging Air Cherenkov Telescopes started to operate.Aims. We aim to probe the possibility of very-high-energy (VHE; E ≥ 100 GeV) gamma rays produced in the early stages of Type Ia supernova explosions.Methods. We performed follow-up observations after this supernova (SN) explosion for five days, between January 27 and February 2 2014. We searched for gamma-ray signals in the energy range between 100 GeV and several TeV from the location of SN 2014J using data from a total of ~5.5 h of observations. Prospects for observing gamma rays of hadronic origin from SN 2014J in the near future are also being addressed.Results. No significant excess was detected from the direction of SN 2014J. Upper limits at 95% confidence level on the integral flux, assuming a power-law spectrum, dF/dE ∝ E− Γ, with a spectral index of Γ = 2.6, for energies higher than 300 GeV and 700 GeV, are established at 1.3 × 10$^{-12}$ and 4.1 × 10$^{-13}$ photons cm$^{-2}$ s$^{-2}$, respectively.Conclusions. For the first time, upper limits on the VHE emission of a Type Ia supernova are established. The energy fraction isotropically emitted into TeV gamma rays during the first ~ 10 days after the supernova explosion for energies greater than 300 GeV is limited to 10$^{-6}$ of the total available energy budget (~1051 erg). Within the assumed theoretical scenario, the MAGIC upper limits on the VHE emission suggest that SN 2014J will not be detectable in the future by any current or planned generation of Imaging Atmospheric Cherenkov Telescopes. Astronomy and astrophysics 602, A98 (2017). doi:10.1051/0004-6361/201629574 Published by EDP Sciences, Les Ulis
E-Prints Complutense arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaarXiv.org e-Print Archive; OpenAIREPreprint . 2017Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Recolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTACroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationshttps://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 2 citations 2 popularity Average influence Average impulse Average Powered by BIP!more_vert E-Prints Complutense arrow_drop_down Archivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaArchivio della Ricerca - Università di PisaArticle . 2017Data sources: Archivio della Ricerca - Università di PisaarXiv.org e-Print Archive; OpenAIREPreprint . 2017Recolector de Ciencia Abierta, RECOLECTA; Docta ComplutenseOther literature type . Article . 2023 . 2017Recolector de Ciencia Abierta, RECOLECTAArticle . 2017 . Peer-reviewedData sources: Recolector de Ciencia Abierta, RECOLECTACroatian Scientific Bibliography - CROSBIOther literature type . 2017Data sources: Croatian Scientific Bibliography - CROSBIInfoscience - EPFL scientific publicationsOther literature typeData sources: Infoscience - EPFL scientific publicationshttps://doi.org/10.48550/arxiv...Article . 2017License: arXiv Non-Exclusive DistributionData sources: Dataciteadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Report , Other literature type 2016 Slovenia, Croatia EnglishAuthors: Kovačič, Boštjan; Pribičević, Boško; Kamnik, Rok;Kovačič, Boštjan; Pribičević, Boško; Kamnik, Rok;Displacement research using the three-dimensional global navigation satellite system (GNSS) as part of geodetic monitoring is becoming the key investigation for establishing a cause-and-effect relationships model between external natural factors, on the one hand, and the criteria that describes the level of functionality and safety of the observed natural or artificial object, on the other, in cases of motion of an object in space and time. The main objective of the deformation analysis is to confirm the stabilities of the reference points of a geodetic network, which are used to determine the movements of the control points that are stabilized on the observed objects. The assumption about the stabilities of certain reference points must be based on reasonable grounds, underpinned by measurements and proven by numerical methods. This is one part of the results of the deformation analysis when determining the extent of the movements and deformations. To do this a transformation is used in which a comparison is made between the coordinates of the points for two separate epochs. On the basis of the estimated transformation parameters, possible movements can be concluded within the reference points, i.e., on whether the datum parameters have changed. After confirming the stability of the geodetic network the coordinate differences of identical points measured within the different time windows can be determined as displacements and/or deformations of an object. In this paper one viaduct was assessed through geology and tectonic activities and also a load test of the viaduct was performed. The viaduct is in a quite active region, but the load test showed that the bridge response to the load is as expected. Spremljanje pomikov s pomočjo tridimenzionalnih globalnih navigacijskih satelitskih metod (GNSS), ki so del geodetskih metod, postajajo ključne preiskave pri ugotavljanju modelov vzrokov in posledic med zunanjimi naravnimi vplivi na eni in kriteriji, ki opisujejo nivo funkcionalnosti in varnosti naravnega ali zgrajenega objekta na drugi strani v primerih pomikov v prostoru in času. Glavni cilj deformacijske analize je potrditi stabilnost referenčnih točk geodetske mreže. Uporablja se za določitev pomikov kontrolnih točk, ki so stabilizirane na opazovanem objektu. Domneva o stabilnosti določenih referenčnih točk mora temeljiti na trdnih dokazih skozi meritve in biti potrjena skozi numerične metode. To je en del deformacijske analize takrat ko določamo vrednosti pomikov in deformacij. Za to je potrebna transformacija, pri kateri se izvede primerjava med koordinatami istih točk v dveh različnih časovnih epohah. Na osnovi ocenjenih transformacijskih parametrov se lahko sklepa o možnih pomikih znotraj referenčnih točk še posebej ali so se spremenili datumski parametri. Po potrditvi stabilnosti geodetske mreže se lahko določijo koordinatne razlike identičnih točk merjenih v različnih časovnih okvirjih, ki se lahko nato opredelijo kot pomiki in/ali deformacije opazovanega objekta. V članku je podana ocena viadukta glede na geologijo in tektonske aktivnosti pa tudi glede na izveden obremenilni preizkus. Viadukt je lociran na precej aktivnem območju, obremenilni preizkus pa je pokazal, da se objekt na zunanjo obtežbo obnaša v skladu s pričakovanji.
Digital library of U... arrow_drop_down Digital library of University of MariborReport . 2018Data sources: Digital library of University of MariborCroatian Scientific Bibliography - CROSBIOther literature type . 2016Data sources: Croatian Scientific Bibliography - CROSBIAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1857::b0081e04d82a12bc24a017d611b55187&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!more_vert Digital library of U... arrow_drop_down Digital library of University of MariborReport . 2018Data sources: Digital library of University of MariborCroatian Scientific Bibliography - CROSBIOther literature type . 2016Data sources: Croatian Scientific Bibliography - CROSBIAll Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1857::b0081e04d82a12bc24a017d611b55187&type=result"></script>'); --> </script>
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