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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Discovery of very high energy gamma rays from PKS 1424+240 and multiwavelength constraints on ITS redshift
Astrophysical Journal Letters, Volume 708, No. 2 PART 2, Year 2010
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Description
We report the first detection of very high energy83Gamma-ray emission above 100 GeV. (VHE) gamma-ray emission above 140 GeV from PKS1424+240, a BL Lac object with an unknown redshift. The photon spectrum above 140 GeV measured by VERITAS is well described by a power law with a photon index of 3.8 0.5stat 0.3syst and a flux normalization at 200 GeV of (5.1 0.9stat 0.5syst) × 10-11 TeV -1 cm-2 s-1, where stat and syst denote the statistical and systematical uncertainties, respectively. The VHE flux is steady over the observation period between MJD 54881 and 55003 (from 2009 February 19 to June 21). Flux variability is also not observed in contemporaneous high-energy observations with the Fermi Large Area Telescope. Contemporaneous X-ray and optical data were also obtained from the Swift XRT and MDM observatory, respectively. The broadband spectral energy distribution is well described by a one-zone synchrotron self-Compton model favoring a redshift of less than 0.1. Using the photon index measured with Fermi in combination with recent extragalactic background light absorption models it can be concluded from the VERITAS data that the redshift of PKS 1424+240 is less than 0.66. © 2010. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Acciari, Victor A.
United States, Amado
Fred Lawrence Whipple Observatory
Aliu, Ester
United States, Newark
University of Delaware
Arlen, Timothy C.
United States, Los Angeles
University of California, Los Angeles
Aune, Taylor
United States, Santa Cruz
University of California, Santa Cruz
Bautista, M.
Canada, Montreal
Université Mcgill
Beilicke, Matthias
United States, St. Louis
Washington University in St. Louis
Benbow, Wystan R.
United States, Amado
Fred Lawrence Whipple Observatory
Boettcher, M.
United States, Athens
Ohio University
Bradbury, Stella M.
United Kingdom, Leeds
University of Leeds
Buckley, James H.
United States, St. Louis
Washington University in St. Louis
Bugaev, Viatcheslav V.
United States, St. Louis
Washington University in St. Louis
Byrum, Karen L.
United States, Lemont
Argonne National Laboratory
Cannon, Anna
Ireland, Dublin
University College Dublin
Cesarini, Andrea
Ireland, Galway
University of Galway
Chow, Y. C.K.
United States, Los Angeles
University of California, Los Angeles
Ciupik, Larry
United States, Chicago
Adler Planetarium
Cogan, Peter
Canada, Montreal
Université Mcgill
Cui, Wei
United States, West Lafayette
Purdue University
Duke, Charles B.
United States, Grinnell
Grinnell College
Falcone, Abraham D.
United States, University Park
Pennsylvania State University
Finley, John P.
United States, West Lafayette
Purdue University
Finnegan, Gary
United States, Salt Lake City
The University of Utah
Fortson, Lucy F.
United States, Chicago
Adler Planetarium
Furniss, Amy K.
United States, Santa Cruz
University of California, Santa Cruz
United States, Anderson
Anderson University
Galante, Nicola
United States, Amado
Fred Lawrence Whipple Observatory
Gall, Daniel
United States, West Lafayette
Purdue University
Gillanders, G. H.
Ireland, Galway
University of Galway
Godambe, Sagar V.
United States, Salt Lake City
The University of Utah
Grube, J.
Ireland, Dublin
University College Dublin
Guénette, Roxanne
Canada, Montreal
Université Mcgill
Gyuk, Geza
United States, Chicago
Adler Planetarium
Hanna, David S.
Canada, Montreal
Université Mcgill
Holder, Jamie A.
United States, Newark
University of Delaware
Hui, C. Michelle
United States, Salt Lake City
The University of Utah
Humensky, T. B.
United States, Chicago
The University of Chicago
Kaaret, Phillip E.
United States, Iowa City
University of Iowa
Karlsson, Niklas
United States, Chicago
Adler Planetarium
Kertzman, M. P.
United States, Greencastle
Depauw University
Kieda, David B.
United States, Salt Lake City
The University of Utah
Konopelko, Alexander K.
United States, Pittsburgh
Pittsburg State University
Krawczynski, Henric S.
United States, St. Louis
Washington University in St. Louis
Krennrich, Frank
United States, Ames
Iowa State University
Lang, Mark J.
Ireland, Galway
University of Galway
LeBohec, Stephan
United States, Salt Lake City
The University of Utah
Maier, Gernot
Canada, Montreal
Université Mcgill
McArthur, Scot P.
United States, St. Louis
Washington University in St. Louis
McCann, Andrew J.
Canada, Montreal
Université Mcgill
McCutcheon, Michael
Canada, Montreal
Université Mcgill
Millis, John P.
United States, West Lafayette
Purdue University
Moriarty, P.
Ireland, Killybegs
Atlantic Technological University
Nagai, T. N.
United States, Ames
Iowa State University
Ong, RenéA A.
United States, Los Angeles
University of California, Los Angeles
Otte, Adam Nepomuk
United States, Santa Cruz
University of California, Santa Cruz
United States, Anderson
Anderson University
Pandel, Dirk
United States, Iowa City
University of Iowa
Perkins, Jeremy S.
United States, Amado
Fred Lawrence Whipple Observatory
Pichel, Ana C.
Argentina, Buenos Aires
Instituto de Astronomía y Física Del Espacio
Pohl, Martin
United States, Ames
Iowa State University
Quinn, John
Ireland, Dublin
University College Dublin
Ragan, K. J.
Canada, Montreal
Université Mcgill
Reyes, Luis C.
United States, Chicago
The University of Chicago
Reynolds, P. T.
Ireland, Bishopstown
Munster Technological University Mtu
Roache, Emmet T.
United States, Amado
Fred Lawrence Whipple Observatory
Rose, H. J.
United Kingdom, Leeds
University of Leeds
Schroedter, Martin
United States, Ames
Iowa State University
Sembroski, Glenn H.
United States, West Lafayette
Purdue University
Smith, Andy W.
United States, Lemont
Argonne National Laboratory
Steele, David
United States, Chicago
Adler Planetarium
Swordy, Simon P.
United States, Chicago
The University of Chicago
Theiling, Mark F.
United States, Amado
Fred Lawrence Whipple Observatory
Thibadeau, S.
United States, St. Louis
Washington University in St. Louis
Varlotta, A.
United States, West Lafayette
Purdue University
Vassiliev, Vladimir V.
United States, Los Angeles
University of California, Los Angeles
Vincent, Stéphane
United States, Salt Lake City
The University of Utah
Wagner, Robert G.
United States, Lemont
Argonne National Laboratory
Wakely, Scott P.
United States, Chicago
The University of Chicago
Ward, John Ennis
Ireland, Dublin
University College Dublin
Weekes, Trevor C.
United States, Amado
Fred Lawrence Whipple Observatory
Weinstein, Amanda
United States, Los Angeles
University of California, Los Angeles
Williams, David A.
United States, Santa Cruz
University of California, Santa Cruz
Wissel, Stephanie A.
United States, Chicago
The University of Chicago
Wood, Matthew D.
United States, Los Angeles
University of California, Los Angeles
Zitzer, Benjamin
United States, West Lafayette
Purdue University
Abdo, Aous A.
United States, Washington, D.c.
U.s. Naval Research Laboratory
United States, Washington, D.c.
National Academy of Sciences
Ackermann, Markus
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Ajello, Marco
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Baldini, Luca
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Ballet, Jean
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Barbiellini, Guido
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Università Degli Studi Di Trieste
Bastieri, D.
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Bechtol, Keith C.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bellazzini, Ronaldo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Berenji, B.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Blandford, Rogerd D.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bloom, Elliott D.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bonamente, Emanuele
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Borgland, Anders W.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Bregeon, Johan
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Brigida, Monica
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Bruel, Philippe V.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Burnett, Thompson H.
United States, Seattle
University of Washington
Caliandro, Giuseppe Andrea
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Cameron, Robert A.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Caraveo, Patrizia A.
Italy, Milan
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Milan
Casandjian, Jean Marc
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Cavazzuti, Elisabetta
Italy, Rome
Agenzia Spaziale Italiana
Cecchi, Claudia
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Çelik, Ö. Ö.
United States, Greenbelt
Nasa Goddard Space Flight Center
United States, Baltimore
University of Maryland, Baltimore County Umbc
Chekhtman, Alexandre
United States, Washington, D.c.
U.s. Naval Research Laboratory
United States, Fairfax
George Mason University
Cheung, Chi C.Teddy
United States, Greenbelt
Nasa Goddard Space Flight Center
Chiang, James
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
United States, Anderson
Anderson University
Ciprini, Stefano
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Claus, Richard
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Cohen-Tanugi, Johann
France, Montpellier
Université de Montpellier
Conrad, Jan
Sweden, Stockholm
Stockholms Universitet
Sweden, Stockholm
Oskar Klein Centre
Cutini, S.
Italy, Rome
Agenzia Spaziale Italiana
Dermer, Charles Dennison
United States, Washington, D.c.
U.s. Naval Research Laboratory
De Angelis, Alessandro D.
Italy, Udine
Università Degli Studi Di Udine
de Palma, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
do Couto E Silva, Eduardo
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Drell, Persis S.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Drlica-Wagner, Alex
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Dubois, Richard
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Dumora, Denis
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Farnier, Christian
France, Montpellier
Université de Montpellier
Favuzzi, Cecilia
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Fegan, Stephen J.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Focke, Warren B.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Fortin, Pascal
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Frailis, Marco
Italy, Udine
Università Degli Studi Di Udine
Fukazawa, Yasushi
Japan, Higashihiroshima
Hiroshima University
Fusco, Piergiorgio G.
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Gargano, Fabio
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Gasparrini, Dario
Italy, Rome
Agenzia Spaziale Italiana
Gehrels, Neil C.
United States, Greenbelt
Nasa Goddard Space Flight Center
Germani, Stefano
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Giebels, Berrie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Giglietto, Nicola
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Giommi, Paolo
Italy, Rome
Agenzia Spaziale Italiana
Giordano, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Glanzman, Thomas
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Godfrey, Gary L.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Grenier, Isabelle A.
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Grove, J. Eric
United States, Washington, D.c.
U.s. Naval Research Laboratory
Guillemot, Lucas
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Guiriec, Sylvain
United States, Huntsville
The University of Alabama in Huntsville
Hays, Elizabeth A.
United States, Greenbelt
Nasa Goddard Space Flight Center
Hughes, Richard E.
United States, Columbus
The Ohio State University
Jóhannesson, Gudlaugur
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Johnson, Anthony S.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Johnson, William Neil
United States, Washington, D.c.
U.s. Naval Research Laboratory
Kamae, Tsuneyoshi
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Katagiri, Hideaki
Japan, Higashihiroshima
Hiroshima University
Kataoka, Jun
Japan, Tokyo
Tokyo Institute of Technology
Japan, Tokyo
Waseda University
Kawai, Nobuyuki
Japan, Tokyo
Tokyo Institute of Technology
Japan, Wako
Riken the Institute of Physical and Chemical Research
Kerr, Matthew T.
United States, Seattle
University of Washington
Kn̈odlseder, Jürgen
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Kuss, Michael W.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Lande, Joshua
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Latronico, Luca
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Longo, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Università Degli Studi Di Trieste
Loparco, Francesco
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Lott, Benoît
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lovellette, Michael N.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Lubrano, Pasquale
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Madejski, Grzegorz M.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mazziotta, Mario Nicola
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
McEnery, Julie E.
United States, Greenbelt
Nasa Goddard Space Flight Center
Michelson, Peter F.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mitthumsiri, Warit
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Mizuno, Tsunefumi
Japan, Higashihiroshima
Hiroshima University
Moiseev, A. V.
United States, Greenbelt
Nasa Goddard Space Flight Center
United States, College Park
University of Maryland, College Park
Monzani, Maria Elena
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Morselli, Aldo
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Moskalenko, Igor V.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Murgia, Simona
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Nolan, Patrick L.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Nuss, Eric
France, Montpellier
Université de Montpellier
Ohsugi, Takashi
Japan, Higashihiroshima
Hiroshima University
Omodei, Nicola
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Orlando, E.
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Ormes, Jonathan F.
United States, Denver
University of Denver
Paneque, David
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Parent, Damien
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Pelassa, Vèronique
France, Montpellier
Université de Montpellier
Pesce-Rollins, Melissa
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Piron, Frédéric
France, Montpellier
Université de Montpellier
Porter, Troy A.
United States, Santa Cruz
University of California, Santa Cruz
Rainó, Silvia
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Rando, Riccardo
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Razzano, Massimiliano
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Reimer, Anita
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Austria, Innsbruck
Universität Innsbruck
Reimer, Olaf
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Austria, Innsbruck
Universität Innsbruck
Reposeur, Thierry
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Rodríguez, Ana Y.
United States, Seattle
University of Washington
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Sadrozinski, Hartmut F.W.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Sánchez, David A.
United States, Columbus
The Ohio State University
Saz-Parkinson, Pablo M.
United States, Moffett Field
Nasa Ames Research Center
Scargle, Jefferey D.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Sgro', Carmelo
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Siskind, Eric J.
United States, Columbus
The Ohio State University
Spandre, G.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Spinelli, Paolo
Italy, Bari
Politecnico Di Bari
Italy, Bari
Istituto Nazionale Di Fisica Nucleare, Sezione Di Bari
Strickman, Mark S.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Suson, Daniel J.
United States, Westville
Purdue University Northwest
Tajima, Hiroyasu
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Takahashi, Hiromitsu
Japan, Higashihiroshima
Hiroshima University
Thayer, Jana B.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Thompson, David J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Tibaldo, Luigi
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Italy, Padua
Istituto Nazionale Di Fisica Nucleare, Sezione Di Padova
Italy, Padua
Università Degli Studi Di Padova
Torres, Diego F.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Tosti, Gino
Italy, Perugia
Istituto Nazionale Di Fisica Nucleare, Sezione Di Perugia
Italy, Perugia
Università Degli Studi Di Perugia
Tramacere, Andrea
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Uchiyama, Yasunobu
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Japan, Chofu
Japan Aerospace Exploration Agency
Usher, Tracy L.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Vilchez, Nicolas P.E.
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Vitale, V.
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Waite, A. P.
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Wang, Peng George
United States, Stanford
Kavli Institute for Particle Astrophysics and Cosmology
Wood, Kent S.
United States, Washington, D.c.
U.s. Naval Research Laboratory
Terndrup, Donald M.
United States, Columbus
The Ohio State University
United States, Alexandria
National Science Foundation
Statistics
Citations: 80
Authors: 220
Affiliations: 73
Identifiers
Doi:
10.1088/2041-8205/708/2/L100
ISSN:
20418205
Research Areas
Environmental