13-18 December 2015
International Conference Centre Geneva
Europe/Zurich timezone

GRS 1915+105 and its spectral variability from the keV to the MeV band

16 Dec 2015, 15:22
Level 0, Room 23 (International Conference Centre Geneva)

Level 0, Room 23

International Conference Centre Geneva

17 Rue de Varembé, 1211 Geneva


Dr Marek Nikolajuk (University of Bialystok)


The microquasar GRS 1915+105 features well known spectral states that were never extensively studied up to the MeV range, where key spectral diagnostics are expected. We present hard X-ray observations obtained in 15 Msec with Swift/BAT and INTEGRAL and spectra collected during different states up to 400 keV. These spectra can be successfully fitted by the EQPAIR model revealing continuous variations of the model parameters, including the inner radius of the accretion disc, along the sequence of spectral states.

Primary author

Dr Marek Nikolajuk (University of Bialystok)


Ming Xu (Chinese Academy of Sciences (CN)) Roland Walter (University of Geneva)

Presentation Materials