作者: JA Zweerink , CW Akerlof , SD Biller , P Boyle , JH Buckley
DOI: 10.1086/311036
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摘要: We present the gamma-ray spectrum of BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The is well fitted by a power law with an exponent 22.5650.0750.1 (statistical and systematic errors). extends 5 no evidence for cutoff, favoring determinations extragalactic infrared energy density that do not produce sharp cutoff at these energies.