Gamma-rays from SS433: evidence for periodicity

Anthony M. Brown; Jamie A. Graham; Kajwan Rasul; Paula M. Chadwick

arxiv: 1903.00299 · v1 · pith:W6N5DJL7new · submitted 2019-03-01 · 🌌 astro-ph.HE

Gamma-rays from SS433: evidence for periodicity

Kajwan Rasul , Paula M. Chadwick , Jamie A. Graham , Anthony M. Brown This is my paper

classification 🌌 astro-ph.HE

keywords ss433emissionevidencegamma-rayanalysisclosedatadetect

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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.

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Temporal evolution of the periodic GeV signal from 4FGL J1913.2+0512 and analysis of the SS 433 / W50 lobes
astro-ph.HE 2026-05 conditional novelty 5.0

Fermi LAT data analysis detects a time-evolving ~162-day periodic GeV signal from 4FGL J1913.2+0512 linked to SS 433, prominent in 2008-2018 but diminished afterward, indicating multi-year evolution in gamma-ray produ...