H.E.S.S. detects historically high fluxes of Very High Energy gamma-rays from PKS 2155-304

Details H.E.S.S. detects historically high fluxes of Very High Energy gamma-rays from PKS 2155-304 H.E.S.S. detects historically high fluxes of Very High Energy gamma-rays from PKS 2155-304

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atel..867....1b&link_type=abstract

The Astronomer's Telegram, #867

Astronomy and Astrophysics

Astronomy

9

>Gev, Request For Observations, Agn

Scientific paper

We report on the H.E.S.S. observations of the blazar PKS 2155-304 at VHE gamma-rays (E>200 GeV) varying between ~40 and ~100% of the Crab flux. On the night of 7/24-25 the source was seen in *preliminary* analyses with a significance of 30 sigma/sqrt(hr), or an average 89% of HESS Crab flux above 200 GeV. On the night of 7/25-26 the source was seen with 25 sigma/sqrt(hr) or an average of 62% Crab.

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