Published in

Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 2(485), p. 2970-2975, 2019

DOI: 10.1093/mnras/stz559

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Gamma-rays from SS433: evidence for periodicity

Journal article published in 2019 by Kajwan Rasul, Paula M. Chadwick ORCID, Jamie A. Graham ORCID, Anthony M. Brown ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

ABSTRACT In this paper we present our study of the gamma-ray emission from the microquasar SS433. Integrating over 9 yr of Fermi-LAT Pass 8 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.