GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE

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dc.contributor.authorVERITAS
dc.contributor.authorSPOL
dc.contributor.authorASAS-SN
dc.contributor.authorOVRO
dc.contributor.authorNuSTAR
dc.contributor.authorCRTS
dc.contributor.otherUtah System of Higher Education
dc.contributor.otherUniversity of Utah
dc.contributor.otherMcGill University
dc.contributor.otherWashington University (WUSTL)
dc.contributor.otherUniversity of California System
dc.contributor.otherUniversity of California Los Angeles
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Astrophysical Observatory
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity College Dublin
dc.contributor.otherUniversity of California Santa Cruz
dc.contributor.otherIowa State University
dc.contributor.otherUniversity of Potsdam
dc.contributor.otherHelmholtz Association
dc.contributor.otherDeutsches Elektronen-Synchrotron (DESY)
dc.contributor.otherCalifornia State University System
dc.contributor.otherCalifornia Polytechnic State University San Luis Obispo
dc.contributor.otherOllscoil na Gaillimhe-University of Galway
dc.contributor.otherYale University
dc.contributor.otherPurdue University System
dc.contributor.otherPurdue University
dc.contributor.otherPurdue University West Lafayette Campus
dc.contributor.otherUniversity of Minnesota System
dc.contributor.otherUniversity of Minnesota Twin Cities
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 Delaware
dc.contributor.otherUniversity of Iowa
dc.contributor.otherUniversity System of Georgia
dc.contributor.otherGeorgia Institute of Technology
dc.contributor.otherUniversity of Chicago
dc.contributor.otherNational Aeronautics & Space Administration (NASA)
dc.contributor.otherNASA Goddard Space Flight Center
dc.contributor.otherCork Institute of Technology
dc.contributor.otherUniversity System of Maryland
dc.contributor.otherUniversity of Maryland College Park
dc.contributor.otherUnited States Department of Energy (DOE)
dc.contributor.otherArgonne National Laboratory
dc.contributor.otherUniversity of Arizona
dc.contributor.otherUniversity System of Ohio
dc.contributor.otherOhio State University
dc.contributor.otherUniversity Diego Portales
dc.contributor.otherCarnegie Institution for Science
dc.contributor.otherAalto University
dc.contributor.otherNational Radio Astronomy Observatory (NRAO)
dc.contributor.otherCalifornia Institute of Technology
dc.contributor.otherUniversidad de Concepcion
dc.contributor.otherStanford University
dc.contributor.otherSLAC National Accelerator Laboratory
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-06-27T21:14:49Z
dc.date.available2019-06-27T21:14:49Z
dc.date.issued2015-12-15
dc.description.abstractOutbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to similar to 200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationAbeysekara, A. U., et al. (2015): Gamma-Rays from the Quasar PKS 1441+ 25: Story of an Escape. The Astrophysical Journal Letters, 815(2). DOI: http://dx.doi.org/10.1088/2041-8205/815/2/L22
dc.identifier.doi10.1088/2041-8205/815/2/L22
dc.identifier.orcidhttps://orcid.org/0000-0002-5955-6383
dc.identifier.orcidhttps://orcid.org/0000-0001-6674-4238
dc.identifier.orcidhttps://orcid.org/0000-0002-2126-2419
dc.identifier.orcidhttps://orcid.org/0000-0002-5491-5244
dc.identifier.orcidhttps://orcid.org/0000-0001-7891-699X
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dc.identifier.orcidhttps://orcid.org/0000-0003-3343-0755
dc.identifier.orcidhttps://orcid.org/0000-0002-5491-5244
dc.identifier.orcidhttps://orcid.org/0000-0001-5704-271X
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dc.identifier.orcidhttps://orcid.org/0000-0001-7297-8217
dc.identifier.orcidhttps://orcid.org/0000-0003-4641-4201
dc.identifier.orcidhttps://orcid.org/0000-0001-9604-2325
dc.identifier.orcidhttps://orcid.org/0000-0003-4785-0101
dc.identifier.orcidhttps://orcid.org/0000-0001-7595-0914
dc.identifier.orcidhttps://orcid.org/0000-0002-4837-5253
dc.identifier.orcidhttps://orcid.org/0000-0002-0529-1973
dc.identifier.orcidhttps://orcid.org/0000-0003-4631-1149
dc.identifier.orcidhttps://orcid.org/0000-0002-5167-1221
dc.identifier.orcidhttps://orcid.org/0000-0002-4596-8563
dc.identifier.orcidhttps://orcid.org/0000-0002-2133-5251
dc.identifier.orcidhttps://orcid.org/0000-0002-2024-8199
dc.identifier.orcidhttps://orcid.org/0000-0001-9868-4700
dc.identifier.orcidhttps://orcid.org/0000-0003-1072-2712
dc.identifier.orcidhttps://orcid.org/0000-0002-8006-9854
dc.identifier.orcidhttps://orcid.org/0000-0002-5221-6669
dc.identifier.orcidhttps://orcid.org/0000-0002-0794-8780
dc.identifier.orcidhttps://orcid.org/0000-0002-4855-2694
dc.identifier.orcidhttps://orcid.org/0000-0002-1853-863X
dc.identifier.orcidhttps://orcid.org/0000-0003-3967-1533
dc.identifier.orcidhttps://orcid.org/0000-0003-2098-170X
dc.identifier.orcidhttps://orcid.org/0000-0001-9206-3460
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5856
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.subjectcosmology: observations
dc.subjectdiffuse radiation
dc.subjectgamma rays: galaxies
dc.subjectquasars: individual (PKS 1441+25-VER J1443+250)
dc.subjectradiation mechanisms: non-thermal
dc.subjectEXTRAGALACTIC BACKGROUND LIGHT
dc.subjectCOMPLETE SAMPLE
dc.subjectBLAZARS
dc.subjectTELESCOPE
dc.subjectRADIATION
dc.subjectSPECTRA
dc.subjectVARIABILITY
dc.subjectABSORPTION
dc.subjectDISCOVERY
dc.subjectEMISSION
dc.subjectAstronomy & Astrophysics
dc.titleGAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPEen_US
dc.typetext
dc.typeArticle

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