AGN observations with a less than 100 GeV threshold using H.E.S.S. II
Abstract
The recent addition of the 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity towards low energies. The lowest energy threshold is obtained using monoscopic observations with CT5, providing access to gamma-ray energies below 100 GeV. This is particularly beneficial for studies of Active Galactic Nuclei (AGN) with soft spectra and located at redshifts >= 0.5. Stereoscopic measurements with the full array (CT1-5) provide a better background rejection than CT5 Mono, at a cost of a higher threshold. We report on the analysis employing the CT5 data for AGN observations with a < 100 GeV threshold. In particular, the spectra of PKS 2155-304 and PG 1553+113 are presented.
Keywords
Cite
@article{arxiv.1509.06509,
title = {AGN observations with a less than 100 GeV threshold using H.E.S.S. II},
author = {Dmitry Zaborov and Carlo Romoli and Andrew M. Taylor and Jean-Philippe Lenain and David Sanchez and Robert D. Parsons},
journal= {arXiv preprint arXiv:1509.06509},
year = {2019}
}
Comments
In Proceedings of the 34th International Cosmic Ray Conference (ICRC2015), The Hague, The Netherlands