V404 Cygni with Fermi-LAT

Abstract

We revisit the well-studied outburst of the low mass X-ray binary (LMXB) system V404 Cygni, and claims of gamma-ray excesses observed with the Fermi-LAT instrument. Upon analysing an 11.5 year dataset with the 8-year LAT point source catalogue and 8-year background models, we find no evidence to suggest that there is high energy gamma-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 gamma-ray emitting blazar B2023+336, a luminous source approximately 0.3 degrees away, which causes source confusion at the position of V404 Cygni, the luminous gamma-ray background, and the use of older background models and catalogues in previous studies.

arXiv comment11 pages, 6 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society

References in corpus (28)

• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Fermi Large Area Telescope Fourth Source Catalog
• Towards a unified model for black hole X-ray binary jets
• Localization and broadband follow-up of the gravitational-wave transient GW150914
• Gamma-ray binaries: pulsars in disguise ?
• Fermi Gamma-ray Imaging of a Radio Galaxy
• Discovery of extreme particle acceleration in the microquasar Cygnus X-3
• A broadband leptonic model for gamma-ray emitting microquasars
• Near-Infrared Spectroscopy of Low Mass X-ray Binaries : Accretion Disk Contamination and Compact Object Mass Determination in V404 Cyg and Cen X-4
• Characterizing the Gamma-Ray Variability of the Brightest Flat Spectrum Radio Quasars Observed with the Fermi LAT
• First AGILE Catalog of High Confidence Gamma-Ray Sources
• A giant radio flare from Cygnus X-3 with associated Gamma-ray emission
• Correlated optical, X-ray, and gamma-ray flaring activity seen with INTEGRAL during the 2015 outburst of V404 Cygni
• Fermi Large Area Telescope Detection of Extended Gamma-Ray Emission from the Radio Galaxy Fornax A
• Detection of gamma rays of likely jet origin in Cygnus X-1
• Swift observations of V404 Cyg during the 2015 outburst: X-ray outflows from super-Eddington accretion
• High-energy gamma-rays from Cyg X-1
• High-energy emission from jet-clump interactions in microquasars
• The Fermi All-sky Variability Analysis: A list of flaring gamma-ray sources and the search for transients in our Galaxy
• Leptonic secondary emission in a hadronic microquasar model
• Gamma-ray observations of the microquasars Cygnus X-1, Cygnus X-3, GRS 1915+105, and GX 339-4 with the Fermi Large Area Telescope
• High-energy gamma-ray observations of the accreting black hole V404 Cygni during its June 2015 outburst
• First INTEGRAL observations of V404 Cygni during the 2015 outburst : spectral behavior in the 20 - 650 keV energy range
• High-energy gamma-ray activity from V404 Cygni detected by AGILE during the 2015 June outburst
• Gamma-Ray Emission from Two Blazars Behind the Galactic Plane: B2013+370 & B2023+336
• MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
• Swift UVOT observations of the 2015 outburst of V404 Cygni
• Very-high-energy observations of the binaries V 404 Cyg and 4U 0115+634 during giant X-ray outbursts

Cited by in corpus (6)

• The Positron Puzzle
• Bhjet: a public multi-zone, steady state jet + thermal corona spectral model
• An update on Fermi-LAT transients in the Galactic plane, including strong activity of Cygnus X-3 in mid-2020
• Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
• The Galactic high mass X-ray binary population with Fermi -LAT
• Extreme Transients in Gamma Rays