Observations of Gamma-ray emission from the blazar Markarian 421 above 250 GeV with the CAT Cherenkov imaging telescope

Details Observations of Gamma-ray emission from the blazar Markarian 421 above 250 GeV with the CAT Cherenkov imaging telescope Observations of Gamma-ray emission from the blazar Markarian 421 above 250 GeV with the CAT Cherenkov imaging telescope

1999-06-07

arxiv.org/abs/astro-ph/9906102v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures to appear in the proceedings of the 26th International Cosmic Ray Conference

Scientific paper

The gamma-ray emission of the blazar Markarian 421 above 250 GeV has been observed by the CAT Cherenkov imaging telescope since December, 1996. We report here results on the source variability up to April, 1998, with emphasis on the 1998 campaign. For the flaring periods of this year, the energy spectrum was derived from 330 GeV up to 5.2 TeV: it is very well represented by a simple power law, with a differential spectral index of 2.96 +/- 0.13.

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