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

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

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...490l.141z&link_type=abstract

Astrophysical Journal Letters v.490, p.L141

Astronomy and Astrophysics

Astronomy

50

Galaxies: Bl Lacertae Objects: Individual Name: Markarian 421, Gamma Rays: Observations

Scientific paper

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 -2.56+/-0.07+/-0.1 (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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