XMM-Newton observations of the microquasars GRO J1655-40 and GRS   1915+105
  We present results of a sequence of XMM-Newton observations of the two microquasars GRO J1655-40 and GRS 1915+105. The observations were preformed using the EPIC-pn camera in the Burst mode. The observations of GRO J1655-40 in a bright state have made possible a substantial improvement in the calibration of the Burst mode, with determination of the rate dependence of the Charge Transfer Efficiency (CTE). We detect He-like Fe K-shell absorption features in the EPIC-pn spectrum of GRO J1655-40, indicating the presence of a highly ionized absorber, and clear absorption features at 0.71 and 0.72 keV in the RGS spectrum, most probably identified as blueshifted Fe XVIII. 
Gloria Sala (1), Jochen Greiner (1), Frank Haberl (1), Eckhard   Kendziorra (2), Konrad Dennerl (1), Michael Freyberg (1) an...