In this paper we present our study of the gamma-ray emission from the microquasar SS433. Integrating over 9 years of Fermi-LAT \textsc{pass8} data, we detect SS433 with a significance of ~13σ in the 200 to 500 MeV photon energy range, with evidence for an extension in the direction of the w1 X-ray `hotspot`. A temporal analysis reveals evidence for modulation of SS433's gamma-ray emission with the precession period of its relativistic jet. This suggests that at least some of SS433's gamma-ray emission originates close to the object rather than from the jet termination regions.
@article{arxiv.1903.00299,
title = {Gamma-rays from SS433: evidence for periodicity},
author = {Kajwan Rasul and Paula M. Chadwick and Jamie A. Graham and Anthony M. Brown},
journal= {arXiv preprint arXiv:1903.00299},
year = {2019}
}
Comments
Accepted for publication in MNRAS, 6 pages, 4 figures