Open AccessThe T[CLC]e[/CLC]V Gamma-Ray Spectrum of Markarian 421 during an Intense Flare
Author(s) -
J. Zweerink,
C. Akerlof,
S. D. Biller,
P. Boyle,
J. H. Buckley,
A. M. Burdett,
J. Bussöns Gordo,
D. A. CarterLewis,
M. Catanese,
M. F. Cawley,
D. J. Fegan,
J. P. Finley,
J. A. Gaidos,
A. M. Hillas,
F. Krennrich,
R. C. Lamb,
R. W. Lessard,
J. E. McEnery,
G. Mohanty,
J. Quinn,
A. J. Rodgers,
H. J. Rose,
F. W. Samuelson,
M. S. Schubnell,
G. Sembroski,
R. Srinivasan,
T. C. Weekes,
C. Wilson
Publication year - 1997
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/311036
Subject(s) - physics , flare , astrophysics , bl lac object , cutoff , spectral density , infrared , gamma ray , blazar , astronomy , observatory , quantum mechanics , statistics , mathematics
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.
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