Speaker
Dr
Fabian Schüssler
(Irfu, CEA-Saclay)
Description
Microquasars, Galactic binary systems showing extended and variable radio emission, are potential gamma-ray emitters. Indications of gamma-ray transient episodes have been reported in at least two systems, Cyg X-1 and Cyg X-3. The identification of additional gamma-ray emitting microquasars is key for a better understanding of these systems.
Very-high energy gamma-ray emission from microquasars has been predicted to happen during periods of transient outbursts potentially connected with the formation of a jet-like outflow. Observations of the microquasars GRS 1915+105, Circinus X-1 and V4641 Sgr were undertaken with the H.E.S.S. telescope array and the RXTE satellite with the aim of detecting a broadband flaring event in the very-high energy gamma-ray and X-ray bands. Contemporaneous observations using the H.E.S.S. telescope array and the RXTE satellite were obtained on three microquasars - GRS 1915+105, Circinus X-1, V4641 Sgr. We report here on the analysis of these data for each system, including a detailed X-ray analysis assessing the location of the sources in a hardness-intensity diagram during observations, and we discuss the derived upper limits on their very-high energy gamma-ray flux.
| Registration number following "ICRC2015-I/" | 288 |
|---|---|
| Collaboration | H.E.S.S. |
Primary author
Dr
Fabian Schüssler
(Irfu, CEA-Saclay)
Co-authors
Hugh Dickinson
(Stockholm University)
Prof.
Jean-Pierre Ernenwein
(CPPM)
Paula Chadwick
(Durham University, UK)
Dr
Pol Bordas
(MPIK-Heidelberg)
