Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
High-energy gamma-ray observations of the accreting black hole V404 Cygni during its 2015 June outburst
Monthly Notices of the Royal Astronomical Society: Letters, Volume 462, No. 1, Year 2016
Notification
URL copied to clipboard!
Description
We report on Fermi/Large Area Telescope observations of the accreting black hole low-mass X-ray binary V404 Cygni during its outburst in 2015 June-July. Detailed analyses reveal a possible excess of γ -ray emission on 2015 26 June, with a very soft spectrum above 100 MeV, at a position consistent with the direction of V404 Cyg (within the 95 per cent confidence region and a chance probability of 4 × 10-4). This emission cannot be associated with any previously known Fermi source. Its temporal coincidence with the brightest radio and hard X-ray flare in the light curve of V404 Cyg, at the end of the main active phase of its outburst, strengthens the association with V404 Cyg. If the γ -ray emission is associated with V404 Cyg, the simultaneous detection of 511 keV annihilation emission by INTEGRAL reqires that the high-energy γ -rays originate away from the corona, possibly in a Blandford-Znajek jet. The data give support to models involving a magnetically arrested disc where a bright γ -ray jet can re-form after the occurrence of a major transient ejection seen in the radio. © 2016 The Authors.
Authors & Co-Authors
Loh, Alan
France, Paris
Insu - Institut National Des Sciences de L'univers
Corbel, Stéphane
France, Paris
Insu - Institut National Des Sciences de L'univers
France, Orleans
Université D'orléans
Dubus, Guillaume
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
France, Paris
Cnrs Centre National de la Recherche Scientifique
Rodríguez, Jérôme Esteban
France, Paris
Insu - Institut National Des Sciences de L'univers
Grenier, Isabelle A.
France, Paris
Insu - Institut National Des Sciences de L'univers
Hovatta, Talvikki
Finland, Espoo
Aalto University
Pearson, Timothy J.
United States, Pasadena
California Institute of Technology
Readhead, Anthony C.S.
United States, Pasadena
California Institute of Technology
Fender, Robert P.
United Kingdom, Oxford
University of Oxford
Mooley, Kunal P.
United Kingdom, Oxford
University of Oxford
Statistics
Citations: 34
Authors: 10
Affiliations: 7
Identifiers
Doi:
10.1093/mnrasl/slw142
ISSN:
17453925
Research Areas
Environmental