V404 Cygni with Fermi-LAT

Harvey, Max; Rulten, Cameron B; Chadwick, Paula M

doi:10.1093/mnras/stab2097

V404 Cygni with Fermi-LAT

Harvey, Max; Rulten, Cameron B; Chadwick, Paula M

Authors

Max Harvey

Dr Cameron Rulten cameron.b.rulten@durham.ac.uk
Post Doctoral Research Associate

Professor Paula Chadwick p.m.chadwick@durham.ac.uk
Head Of Department

Abstract

We revisit the well-studied outburst of the low-mass X-ray binary (LMXB) system V404 Cygni, and claims of γ-ray excesses observed with the Fermi-LAT instrument. Upon analysing an 11.5 yr data set with the 8-yr LAT point source catalogue and 8-yr background models, we find no evidence to suggest that there is high energy γ-ray emission during the outburst period (or at any other time) from V404 Cygni. This is due to the proximity of V404 Cygni to the γ-ray emitting blazar B2023+336, a luminous source approximately 0.3○ away, which causes source confusion at the position of V404 Cygni, the luminous γ-ray background, and the use of older background models and catalogues in previous studies.

Citation

Harvey, M., Rulten, C. B., & Chadwick, P. M. (2021). V404 Cygni with Fermi-LAT. Monthly Notices of the Royal Astronomical Society, 506(4), 6029-6038. https://doi.org/10.1093/mnras/stab2097

Journal Article Type	Article
Acceptance Date	Jul 18, 2021
Online Publication Date	Jul 22, 2021
Publication Date	2021-10
Deposit Date	Oct 29, 2021
Publicly Available Date	Nov 10, 2021
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	506
Issue	4
Pages	6029-6038
DOI	https://doi.org/10.1093/mnras/stab2097
Related Public URLs	https://arxiv.org/abs/2107.09395

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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.