1670009

The black hole X-ray binary GRS1915+105 (1915) has been in outburst since 1992. 1915 is the first micro-quasar that showed relativistic super-luminal radio ejections (Mirabel+1994) and it is known for its X-ray variability states (Belloni+1999) and the clear disk:jet coupling. We hereby ask for 90ks of INTEGRAL observing time to be scheduled overlapping with the 45ks XMM-Newton TOO in order to probe the high-energy emission of 1915. Only XMM-Newton and INTEGRAL are able to provide the long uninterrupted observations necessary to probe the X-ray emission of GRS1915+105 on hourly time-scales. Our main goal is to probe the accretion flow in this unusual accretion state through broad-band spectroscopy of the source which will also potentially offer new insights into the properties of accretion disc and of possible outflows. [truncated! Please see actual data for full text]