Fermi Gamma-ray Space Telescope

The Multiwavelenght campaign on PKS 2155-304 with Nustar, Fermi and H.E.S.S.

David Sanchez
B. Giebels, D Zaborov, D. Parson for the H.E.S.S. and Fermi collaborations

Abstract:

The blazar PKS 2155-304 was the target of a multi-wavelength campaign from June to October 2013 which widely improves our knowledge of its spectral energy distribution. This campaign involved the NuStar satellite (3-79 keV), the Fermi Large Area Telescope (LAT, 20MeV-300GeV) and the High Energy Stereoscopic System (H.E.S.S.) array phase II (with an energy threshold of few tens of GeV). While the observations with NuStar extend the X-ray spectrum to higher energies than before, H.E.S.S. phase II, together with the use of the LAT Pass 8 reprocessed data if available, enhance the coverage of the gamma-ray regime with an unprecedented precision. In this poster, preliminary results from the multi-wavelength analysis will be presented.