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Gamma-rays from SS433 : evidence for periodicity.

Rasul, Kajwan and Chadwick, Paula M. and Graham, Jamie A. and Brown, Anthony M. (2019) 'Gamma-rays from SS433 : evidence for periodicity.', Monthly notices of the Royal Astronomical Society., 485 (2). pp. 2970-2975.


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.

Item Type:Article
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Publisher statement:© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
Date accepted:21 February 2019
Date deposited:19 March 2019
Date of first online publication:28 February 2019
Date first made open access:19 March 2019

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