Gamma-rays from SS433: evidence for periodicity

Abstract

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 ~13$\sigma$ 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.

Accepted for publication in MNRAS, 6 pages, 4 figures

References in corpus (4)

• Production of gamma rays and neutrinos in the dark jets of the microquasar SS433
• Non thermal emission from microquasar/ISM interaction
• High-energy gamma-ray observations of the accreting black hole V404 Cygni during its June 2015 outburst
• Structure and Magnetic Fields in the Precessing Jet System SS433 III. Evolution of the Intrinsic Brightness of the Jets from a Deep Multi-Epoch VLA Campaign

Cited by in corpus (2)

• GeV-TeV Counterparts of SS 433/W50 from Fermi-LAT and HAWC Observations
• Tentative evidence of spatially extended GeV emission from SS433/W50