Masaq Index
arXiv 1999-06-08 0 views

VHE Gamma Rays from PKS 2155-304

Chadwick, P. M. · Lyons, K. · McComb, T. J. L. · Orford, K. J. · Osborne, J. L. · Rayner, S. M. · Shaw, S. E. · Turver, K. E.

Original · EN

The X-ray selected BL Lac PKS 2155-304 has been observed using the University of Durham Mark 6 very high energy gamma ray telescope during 1998. We find no evidence for TeV emission during these recent observations when the X-ray flux was observed to be low. We have reconsidered our measurements made in 1997 November when PKS 2155-304 was in a bright X-ray state and extended X-ray and GeV gamma ray observations were made as part of a multiwavelength campaign. Comparisons are made of the VHE emission during this time with the available data from other wavelengths.

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