Constraints on Very High Energy Emission from GRB 130427A
Creators: name: Aliu, E.
name: Aune, T.
name: Barnacka, A.
name: Beilicke, M.
name: Benbow, W.
name: Berger, K.
name: Biteau, J.
name: Buckley, J. H.
name: Bugaev, V.
name: Byrum, K.
name: Cardenzana, J. V
name: Cerruti, M.
name: Chen, X.
name: Ciupik, L.
name: Connaughton, V.
name: Cui, W.
name: Dickinson, H. J.
name: Eisch, J. D.
name: Errando, M.
name: Falcone, A.
name: Federici, S.
name: Feng, Q.
name: Finley, J. P.
name: Fleischhack, H.
name: Fortin, P.
name: Fortson, L.
name: Furniss, A.
name: Galante, N.
name: Gillanders, G. H.
name: Griffin, S.
name: Griffiths, S. T.
name: Grube, J.
name: Gyuk, G.
name: Håkansson, N.
name: Hanna, D.
name: Holder, J.
name: Hughes, G.
name: Humensky, T. B.
name: Johnson, C. A.
name: Kaaret, P.
name: Kar, P.
name: Kertzman, M.
name: Khassen, Y.
name: Kieda, D.
name: Krawczynski, H.
name: Krennrich, F.
name: Lang, M. J.
name: Madhavan, A. S.
name: Maier, G.
name: McArthur, S.
name: McCann, A.
name: Meagher, K.
name: Millis, J.
name: Moriarty, P.
name: Mukherjee, R.
name: Nieto, D.
name: de Bhróithe, A. O'Faoláin
name: Ong, R. A.
name: Otte, A. N.
name: Park, N.
name: Pohl, M.
name: Popkow, A.
name: Prokoph, H.
name: Pueschel, E.
name: Quinn, J.
name: Ragan, K.
name: Rajotte, J.
name: Reyes, L. C.
name: Reynolds, P. T.
name: Richards, G. T.
name: Roache, E.
name: Sembroski, G. H.
name: Shahinyan, K.
name: Smith, A. W.
name: Staszak, D.
name: Telezhinsky, I.
name: Tucci, J. V.
name: Tyler, J.
name: Varlotta, A.
name: Vassiliev, V. V.
name: Vincent, S.
name: Wakely, S. P.
name: Weiner, O. M.
name: Weinstein, A.
name: Welsing, R.
name: Wilhelm, A.
name: Williams, D. A.
name: Zitzer, B.
name: McEnery, J. E.
name: Perkins, J. S.
name: Veres, P.
name: Zhu, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Prompt emission from the very fluent and nearby (z=0.34) gamma-ray burst GRB 130427A was detected by several orbiting telescopes and by ground-based, wide-field-of-view optical transient monitors. Apart from the intensity and proximity of this GRB, it is exceptional due to the extremely long-lived high-energy (100 MeV to 100 GeV) gamma-ray emission, which was detected by the Large Area Telescope on the Fermi Gamma-ray Space Telescope for ~70 ks after the initial burst. The persistent, hard-spectrum, high-energy emission suggests that the highest-energy gamma rays may have been produced via synchrotron self-Compton processes though there is also evidence that the high-energy emission may instead be an extension of the synchrotron spectrum. VERITAS, a ground-based imaging atmospheric Cherenkov telescope array, began follow-up observations of GRB 130427A ~71 ks (~20 hr) after the onset of the burst. The GRB was not detected with VERITAS; however, the high elevation of the observations, coupled with the low redshift of the GRB, make VERITAS a very sensitive probe of the emission from GRB 130427A for E &gt; 100 GeV. The non-detection and consequent upper limit derived place constraints on the synchrotron self-Compton model of high-energy gamma-ray emission from this burst.
description: 22 pages, 4 figures, 1 table