VHE Gamma Rays from PKS 2155-304
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 from this object with a time-averaged integral flux of (4.2 +/- 0.7 (stat) +/- 2.0 (sys)) x 10^(-11) per cm2 per s. There is evidence for VHE gamma ray emission during our observations in 1996 September and 1997 October/November, with the strongest emission being 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 show evidence of a correlation.
Cite
@article{arxiv.astro-ph/9810209,
title = {VHE Gamma Rays from PKS 2155-304},
author = {P. M. Chadwick and K. Lyons and T. J. L. McComb and K. J. Orford and J. L. Osborne and S. M. Rayner and S. E. Shaw and K. E. Turver and G. J. Wieczorek},
journal= {arXiv preprint arXiv:astro-ph/9810209},
year = {2016}
}
Comments
14 pages, 6 figures, accepted for publication in Ap. J