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The TeV Gamma-Ray Spectrum of Markarian 421 During an Intense Flare

Zweerink, J. and Akerlof, C. W. and Biller, S. D. and Boyle, P. and Buckley, J. H. and Burdett, A. and Bussons Gordo, J. and Carter-Lewis, D. A. and Catanese, M. and Cawley, M. F. and Fegan, D. J. and Finley, John P. and Gaidos, J. A. and Hillas, A. M. and Krennrich, F. and Lamb, R. C. and Lessard, R. W. and McEnery, J. E. and Mohanty, G. and Quinn, J. and Rodgers, A. J. and Rose, H. J. and Samuelson, F. W. and Schubnell, S. and Sembroski, G. and Srinivasan, R. and Weekes, T. C. and Wilson, C. (1997) The TeV Gamma-Ray Spectrum of Markarian 421 During an Intense Flare. Astrophysical Journal Letters, 490 (2). L141-L144. ISSN 2041-8205. http://resolver.caltech.edu/CaltechAUTHORS:20141203-154742327

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Abstract

We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of 22.5650.0750.1 (statistical and systematic errors). The spectrum extends above 5 TeV with no evidence for a cutoff, favoring determinations of the extragalactic infrared energy density that do not produce a sharp cutoff at these energies.


Item Type:Article
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http://iopscience.iop.org/1538-4357/490/2/L141PublisherArticle
Additional Information:© 1997. The American Astronomical Society. Received 1997 July 30, accepted for publication 1997 September 29. Published 1997 October 30. We acknowledge the technical assistance of K. Harris. This research is supported by grants from the US Department of Energy and by NASA, PPARC in the UK, and Forbairt in Ireland.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
United States Department of EnergyUNSPECIFIED
NASAUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1997-56
Record Number:CaltechAUTHORS:20141203-154742327
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141203-154742327
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52357
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:05 Dec 2014 23:52
Last Modified:05 Dec 2014 23:52

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