GeV outburst in Mrk501
D. Bertsch, R. Hartman, D. Thompson
Mrk501 has recently been detected at GeV energies (Kataoka et al. 1999),
making it the 3rd TeV blazar with a known GeV component. Previous
multiwavelength campaigns showed well correlated outburts at x-ray and
TeV energies; however no significant changes were observed in the mean
GeV emission. We present here new evidence for GeV outburts in Mrk501.
The photon spectrum appears to be extremely hard compared to the typical
GeV blazar. Further, this outbursts appears uncorrelated with enhanced
emission at x-ray energies. The resulting spectral energy distribution (SED)
during the outburst suggests a cutoff in the high-energy emission beyond
a few hundred GeV. We discuss compatibility of the Mrk501 SED with
current theoretical models on blazar emission.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.