PKS 2155-304 - a source of VHE gamma-rays

Abstract

The close X-ray selected BL Lac PKS 2155--304 has been observed using the University of Durham Mark 6 very high energy (VHE) gamma ray telescope during 1996 September/October/November and 1997 October/November. VHE gamma rays with energy > 300 GeV were detected with a time-averaged integral flux of (4.2 +/- 0.7 (stat) +/- 2.0 (sys)) x 10^-11 cm^-2 s^-1. There is evidence for VHE gamma ray emission during our observations in 1996 September and 1997 October/November. The strongest emission was detected in 1997 November, when the object was producing the largest flux ever recorded in high-energy X-rays and was detected in > 100 MeV gamma-rays. The VHE and X-ray fluxes are correlated.

7 pages, 4 figures, presented at the VERITAS Workshop on the TeV Astrophysics of Extragalactic Objects, to be published in Astroparticle Physics

References in corpus (6)

• A theoretical unifying scheme for gamma-ray bright blazars
• Multiwavelength Observations of a Flare from Markarian 501
• Discovery of >350 GeV Gamma Rays from the BL Lacertae Object 1ES 2344+514
• A Study of High Energy Emission from the TeV blazar Mrk 501 during Multiwavelength Observations in 1996
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• Detection of TeV Gamma Rays from the BL Lac Object 1ES1959+650 with the Whipple 10m Telescope
• The Gamma-Ray Window to Intergalactic Magnetism
• A multiwavelength view of the flaring state of PKS 2155-304 in 2006
• Cosmic Physics: The High Energy Frontier
• Observation of X-ray variability in the BL Lac object 1ES1959+65
• Particle Identification by Multifractal Parameters in Gamma-Astronomy with the HEGRA-Cherenkov-Telescopes
• Analysis of the H.E.S.S. public data release with ctools
• The Cluster-Scale Environment of PKS 2155-304
• Searching for photon-ALPs mixing effects in AGN gamma-ray energy spectra
• The H.E.S.S. extragalactic sky survey with the first decade of observations