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Journal article
GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE
Astrophysical journal. Letters, v 815(2)
15 Dec 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
ABSTRACT Outbursts 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 ∼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.
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- Title
- GAMMA-RAYS FROM THE QUASAR PKS 1441+25: STORY OF AN ESCAPE
- Creators
- A. U Abeysekara - University of UtahS Archambault - McGill UniversityA Archer - Washington University in St. LouisT Aune - University of California, Los AngelesA Barnacka - Harvard UniversityW Benbow - Harvard UniversityR Bird - University College DublinJ Biteau - University of Paris-SudJ. H Buckley - Washington University in St. LouisV Bugaev - Washington University in St. LouisJ. V Cardenzana - Iowa State UniversityM Cerruti - University of ParisX Chen - University of PotsdamJ. L Christiansen - California Polytechnic State UniversityL Ciupik - Adler PlanetariumM. P Connolly - National University of Ireland, GalwayP Coppi - Yale University Department of Astronomy, New Haven, CT 06520-8101, USAW Cui - Purdue University West LafayetteH. J Dickinson - University of Minnesota School of Physics and Astronomy, Minneapolis, MN 55455, USAJ Dumm - University of MinnesotaJ. D Eisch - Iowa State UniversityM Errando - Barnard CollegeA Falcone - Pennsylvania State UniversityQ Feng - Purdue University West LafayetteJ. P Finley - Purdue University West LafayetteH Fleischhack - University of MinnesotaA Flinders - University of UtahP Fortin - Harvard UniversityL Fortson - University of Minnesota School of Physics and Astronomy, Minneapolis, MN 55455, USAA Furniss - California State University, East BayG. H Gillanders - National University of Ireland, GalwayS Griffin - McGill UniversityJ Grube - Adler PlanetariumG Gyuk - Adler PlanetariumM Hütten - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyN Håkansson - University of PotsdamD Hanna - McGill UniversityJ Holder - University of DelawareT. B Humensky - Columbia UniversityC. A Johnson - University of California, Santa CruzP Kaaret - University of IowaP Kar - University of UtahN Kelley-Hoskins - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyY Khassen - University College DublinD Kieda - University of UtahM Krause - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyF Krennrich - Iowa State UniversityS Kumar - University of DelawareM. J Lang - National University of Ireland, GalwayG Maier - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyS McArthur - Purdue University West LafayetteA McCann - McGill UniversityK Meagher - Georgia Institute of TechnologyP Moriarty - National University of Ireland, GalwayR Mukherjee - Columbia UniversityD Nieto - Columbia UniversityA. O'Faoláin de Bhróithe - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyR. A Ong - University of California, Los AngelesA. N Otte - Georgia Institute of TechnologyN Park - University of ChicagoJ. S Perkins - Goddard Space Flight CenterA Petrashyk - Columbia UniversityM Pohl - University of PotsdamA Popkow - University of California, Los AngelesE Pueschel - University College DublinJ Quinn - University College DublinK Ragan - McGill UniversityG Ratliff - Adler PlanetariumP. T Reynolds - Cork Institute of TechnologyG. T Richards - Georgia Institute of TechnologyE Roache - Harvard UniversityJ Rousselle - University of California, Los AngelesM Santander - Columbia UniversityG. H Sembroski - Purdue University West LafayetteK Shahinyan - University of MinnesotaA. W Smith - University of Maryland, College ParkD Staszak - McGill UniversityI Telezhinsky - University of PotsdamN. W Todd - Washington University in St. LouisJ. V Tucci - Purdue University West LafayetteJ Tyler - McGill UniversityV. V Vassiliev - University of California, Los AngelesS Vincent - DESY, Platanenallee 6 , D-15738 Zeuthen, GermanyS. P Wakely - University of ChicagoO. M Weiner - Columbia UniversityA Weinstein - Iowa State University Department of Physics and Astronomy, Ames, IA 50011, USAA Wilhelm - University of PotsdamD. A Williams - University of California, Santa CruzB Zitzer - Argonne National LaboratoryP. S Smith - University of ArizonaT. W.-S Holoien - The Ohio State UniversityJ. L Prieto - Millennium InstituteC. S Kochanek - The Ohio State UniversityK. Z Stanek - The Ohio State University Center for Cosmology and AstroParticle Physics, 191 W. Woodruff Ave., Columbus, OH 43210, USAB Shappee - Carnegie Institution for ScienceT Hovatta - Aalto UniversityW Max-Moerbeck - National Radio Astronomy ObservatoryT. J Pearson - California Institute of TechnologyR. A Reeves - University of ConcepciónJ. L Richards - Purdue University West LafayetteA. C. S Readhead - California Institute of TechnologyG. M Madejski - Stanford UniversityS. G Djorgovski - California Institute of TechnologyA. J Drake - California Institute of TechnologyM. J Graham - California Institute of TechnologyA Mahabal - California Institute of TechnologyVERITAS
- Publication Details
- Astrophysical journal. Letters, v 815(2)
- Publisher
- The American Astronomical Society
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000369081700006
- Scopus ID
- 2-s2.0-84951810477
- Other Identifier
- 991019201215804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics