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19 April 2024

» arxiv » 1309.5949

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A search for enhanced very-high-energy gamma-ray emission from the March 2013 Crab Nebula flare
VERITAS Collaboration ; E. Aliu ; S. Archambault ; T. Aune ; W. Benbow ; K. Berger ; R. Bird ; A. Bouvier ; J. H. Buckley ; V. Bugaev ; K. Byrum ; M. Cerruti ; X. Chen ; L. Ciupik ; M. P. Connolly ; W. Cui ; J. Dumm ; M. Errando ; A. Falcone ; S. Federici ; Q. Feng ; J. P. Finley ; P. Fortin ; L. Fortson ; A. Furniss ; N. Galante ; G. H. Gillanders ; S. Griffin ; S. T. Griffiths ; J. Grube ; G. Gyuk ; D. Hanna ; J. Holder ; G. Hughes ; T. B. Humensky ; P. Kaaret ; M. Kertzman ; Y. Khassen ; D. Kieda ; F. Krennrich ; S. Kumar ; M. J. Lang ; M. Lyutikov ; G. Maier ; S. McArthur ; A. McCann ; K. Meagher ; J. Millis ; P. Moriarty ; R. Mukherjee ; A. O'Faolain de Bhroithe ; R. A. Ong ; A. N. Otte ; J. S. Perkins ; M. Pohl ; A. Popkow ; J. Quinn ; K. Ragan ; J. Rajotte ; L. C. Reyes ; P. T. Reynolds ; G. T. Richards ; E. Roache ; G. H. Sembroski ; F. Sheidaei ; A. W. Smith ; D. Staszak ; I. Telezhinsky ; M. Theiling ; J. V. Tucci ; J. Tyler ; A. Varlotta ; S. P. Wakely ; T. C. Weekes ; A. Weinstein ; R. Welsing ; D. A. Williams ; A. Zajczyk ; B. Zitzer ;
Date:	23 Sep 2013
Abstract:	In March 2013, a flaring episode from the Crab Nebula lasting ~2 weeks was detected by the Fermi-LAT (Large Area Telescope on board the Fermi Gamma-ray Space Telescope). VERITAS provides simultaneous observations throughout this period. During the flare, the Fermi-LAT detected a 20-fold increase in flux above the average synchrotron flux >100 MeV seen from the Crab Nebula. Simultaneous measurements with VERITAS are consistent with the non-variable long-term average Crab Nebula flux at TeV energies. Assuming a linear correlation between the very-high-energy flux change >1 TeV and the flux change seen in the Fermi-LAT band >100 MeV during the period of simultaneous observations, the linear correlation factor can be constrained to be at most 8.6 * 10^-3 with 95% confidence.
Source:	arXiv, 1309.5949
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