VHE Gamma Rays from PKS 2155 – 304
نویسندگان
چکیده
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) × 10 −11 cm −2 s −1. 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.
منابع مشابه
ar X iv : a st ro - p h / 98 12 12 2 v 1 7 D ec 1 99 8 PKS 2155 – 304 — a source of VHE γ - rays
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)×10 −11 cm −2 s −1. There is evidence for VHE gamma ray emission during our...
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