Acis-Hetg Observations of Microquasar XTE J1748-288

Mathematics – Logic

Scientific paper

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Chandra Proposal Id #02400850

Scientific paper

RXTE observations of the recently discovered microquasar XTE J1748-288 reveal spectral differences between the very high, high, and low state. ASCA & RXTE observations show prominent iron line(s). We propose HETG 140ks total exposure over these 3 phases in order to characterize the X-ray spectral features and resolve presently unknown lines for these 3 phenomenological states. We will also look for emission lines from any X-ray jet, and P-Cygni profiles indicative of a disk-wind. This will allow for a comprehensive study (when compared to our Cycle 1 Chandra observations of GRS1915+105, SS433, and Cir X-1) of GBC systems, and in particular of the poorly understood systems termed microquasars.

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