VERITAS Observations of the BL Lac Object PG 1553+113 Between May 2010 and May 2011
Abstract
VERITAS, an array of imaging atmospheric-Cherenkov telescopes, studies blazars in the energy range between ~100 GeV and ~30 TeV. With its excellent sensitivity at these energies, and ever-deepening source exposures, VERITAS is in a position to probe distant blazars for clear absorption signatures in their very-high-energy gamma-ray spectra due to interactions with the extragalactic background light (EBL). We discuss results from recent VERITAS observations of PG 1553+113 (z > 0.4) which have resulted in the most significant very-high-energy detection ever obtained for this source. The most recent VERITAS spectral measurements are used to place an upper limit on the source redshift of z < 0.5 at the 95% confidence level. Also discussed are the prospects of using these observations, along with those of other hard- spectrum blazars, to place constraints on the EBL.
Keywords
Cite
@article{arxiv.1110.4643,
title = {VERITAS Observations of the BL Lac Object PG 1553+113 Between May 2010 and May 2011},
author = {Matthew Orr},
journal= {arXiv preprint arXiv:1110.4643},
year = {2019}
}
Comments
4 pages, to appear in proceedings of the 32nd ICRC, Beijing, China