The Inner Accretion Flow in the Galactic Microquasar GRS 1758-258
Abstract
GRS 1758-258 is persistent X-ray source considered to be a black hole binary on the basis of its hard X-ray emission and similarities to Cygnus X-1. The additional detection of relativistic jets is of great interest given the potential to test theoretical models of outflow physics. Previous observations of GRS 1758-258 have revealed a power-law dominated hard X-ray spectrum. Herein, we present the results of a 50 ks observation with NuSTAR. The source is clearly detected across the NuSTAR bandpass and reveals for the first time the characteristic features of relativistic reflection from the inner accretion disk at a luminosity of $\sim$ 1\% Eddington. We will present the results of our analysis of this observation and the constraints this places on the inner accretion flow from a persistently active microquasar.
- Publication:
-
AAS/High Energy Astrophysics Division
- Pub Date:
- March 2019
- Bibcode:
- 2019HEAD...1711246R