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

1999/06/07 by F. Piron, Piron, F.
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences

paper · pdf · doi:10.48550/arxiv.astro-ph/9906102

openalex publication_date 1999/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

Related

• Observations of the gamma-Ray Emission Above 250 Gev from the Blazars Markarian 501 and Markarian 421 by the Cat Cherenkov Atmospheric Imaging Telescope
• Intensive TeV Gamma-Ray and X-Ray Observations of the Blazar Mrk 421 in December 2002 and January 2003
• SST-1M Observations of Markarian 421
• Observations of Mkn 421 using Pachmarhi Array of Čerenkov Telescopes
• TeV Gamma Ray Blazar Monitoring Campaign