The most powerful flaring activity from the NLSyl PMN J0948+0022

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dc.contributor.authorVERITAS Collaboration
dc.contributor.otherUniversity of Bologna
dc.contributor.otherIstituto Nazionale Astrofisica (INAF)
dc.contributor.otherUnited States Department of Defense
dc.contributor.otherUnited States Navy
dc.contributor.otherNaval Research Laboratory
dc.contributor.otherCalifornia Institute of Technology
dc.contributor.otherRoyal Institute of Technology
dc.contributor.otherOskar Klein Centre
dc.contributor.otherNational Radio Astronomy Observatory (NRAO)
dc.contributor.otherNational Aeronautics & Space Administration (NASA)
dc.contributor.otherNASA Goddard Space Flight Center
dc.contributor.otherPurdue University System
dc.contributor.otherPurdue University
dc.contributor.otherPurdue University West Lafayette Campus
dc.contributor.otherWashington University (WUSTL)
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity of Delaware
dc.contributor.otherUniversity College Dublin
dc.contributor.otherIowa State University
dc.contributor.otherUniversity of Potsdam
dc.contributor.otherHelmholtz Association
dc.contributor.otherDeutsches Elektronen-Synchrotron (DESY)
dc.contributor.otherColumbia University
dc.contributor.otherPennsylvania Commonwealth System of Higher Education (PCSHE)
dc.contributor.otherPennsylvania State University
dc.contributor.otherPennsylvania State University - University Park
dc.contributor.otherUniversity of Minnesota System
dc.contributor.otherUniversity of Minnesota Twin Cities
dc.contributor.otherUniversity of California System
dc.contributor.otherUniversity of California Santa Cruz
dc.contributor.otherOllscoil na Gaillimhe-University of Galway
dc.contributor.otherUniversity of Iowa
dc.contributor.otherUtah System of Higher Education
dc.contributor.otherUniversity of Utah
dc.contributor.otherDePauw University
dc.contributor.otherUniversity of Chicago
dc.contributor.otherUniversity System of Georgia
dc.contributor.otherGeorgia Institute of Technology
dc.contributor.otherUniversity of California Los Angeles
dc.contributor.otherMcGill University
dc.contributor.otherCork Institute of Technology
dc.contributor.otherUnited States Department of Energy (DOE)
dc.contributor.otherArgonne National Laboratory
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-07-03T20:14:43Z
dc.date.available2019-07-03T20:14:43Z
dc.date.copyright2014
dc.date.issued2014-11-27
dc.description.abstractWe report on multifrequency observations performed during 2012 December-2013 August of the first narrow-line Seyfert 1 galaxy detected in gamma-rays, PMN J0948+0022 (z = 0.5846). A y -ray flare was observed by the Large Area Telescope on board Fermi during 2012 December-2013 January, reaching a daily peak flux in the 0.1-100 GeV energy range of (155 31) x 10 8 ph cm(-2) S-1 on 2013 January 1, corresponding to an apparent isotropic luminosity of similar to 1.5 x 1048 erg s(-1). The y -ray flaring period triggered Swift and Very Energetic Radiation Imaging Telescope Array System (VERITAS) observations in addition to radio and optical monitoring by Owens Valley Radio Observatory, Monitoring Of Jets in Active galactic nuclei with VLBA Experiments, and Catalina Real-time Transient Survey. A strong flare was observed in optical, UV, and X-rays on 2012 December 30, quasi-simultaneously to the y -ray flare, reaching a record flux for this source from optical to y gamma-rays. VERITAS observations at very high energy (E > 100 GeV) during 2013 January 6-17 resulted in an upper limit of F>0.2 Trev < 4.0 x 10(-12) ph cm(-2) s(-1). We compared the spectral energy distribution (SED) of the flaring state in 2013 January with that of an intermediate state observed in 2011. The two SEDs, modelled as synchrotron emission and an external Compton scattering of seed photons from a dust torus, can be modelled by changing both the electron distribution parameters and the magnetic field.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationD’Ammando, F., et al. (2014): The Most Powerful Flaring Activity from the NLSy1 PMN J0948+0022. Monthly Notices of the Royal Astronomical Society, 446(3). DOI: https://doi.org/10.1093/mnras/stu2251
dc.identifier.doi10.1093/mnras/stu2251
dc.identifier.orcidhttps://orcid.org/0000-0002-5491-5244
dc.identifier.orcidhttps://orcid.org/0000-0003-3343-0755
dc.identifier.orcidhttps://orcid.org/0000-0001-7891-699X
dc.identifier.orcidhttps://orcid.org/0000-0002-5955-6383
dc.identifier.orcidhttps://orcid.org/0000-0002-5491-5244
dc.identifier.orcidhttps://orcid.org/0000-0002-2126-2419
dc.identifier.orcidhttps://orcid.org/0000-0001-7861-1707
dc.identifier.orcidhttps://orcid.org/0000-0002-4855-2694
dc.identifier.orcidhttps://orcid.org/0000-0002-1432-7771
dc.identifier.orcidhttps://orcid.org/0000-0002-4837-5253
dc.identifier.orcidhttps://orcid.org/0000-0001-7297-8217
dc.identifier.orcidhttps://orcid.org/0000-0003-4785-0101
dc.identifier.orcidhttps://orcid.org/0000-0003-4641-4201
dc.identifier.orcidhttps://orcid.org/0000-0003-4470-7094
dc.identifier.orcidhttps://orcid.org/0000-0003-3967-1533
dc.identifier.orcidhttps://orcid.org/0000-0001-7618-7527
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5898
dc.languageEnglish
dc.language.isoen_US
dc.publisherOxford University Press
dc.rights.holderThe Authors
dc.subjectgalaxies: active-galaxies: individual: PMN J0948+0022
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: Seyfert
dc.subjectgamma-rays: general
dc.subjectLINE SEYFERT 1
dc.subjectGAMMA-RAY EMISSION
dc.subjectLARGE-AREA TELESCOPE
dc.subjectEXTRAGALACTIC BACKGROUND LIGHT
dc.subjectQUASAR PKS 1510-089
dc.subjectX-RAY
dc.subjectGALACTIC NUCLEI
dc.subjectRADIO-LOUD
dc.subjectMULTIWAVELENGTH OBSERVATIONS
dc.subjectCOMPTON ANALYSIS
dc.subjectAstronomy & Astrophysics
dc.titleThe most powerful flaring activity from the NLSyl PMN J0948+0022en_US
dc.typetext
dc.typeArticle

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