Observation of the extremely bright flare of the FSRQ 3C279 with H.E.S.S. II

Understand

In June 2015, the Flat Spectrum Radio Quasar 3C 279 underwent an extremely bright gamma-ray flare, with an increase of the flux above 100 MeV by a factor 10 in less than 1 day, revealing an intrinsic variability timescale of 2 minutes as detected by the Fermi-LAT.

• We present results of target of opportunity observations with the H.E.S.S.
• experiment on this source over the nights around the peak of the outburst.
• The H.E.S.S.