Acis-Hetg Observations of Microquasar XTE J1748-288

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Chandra Proposal Id #03400626

Scientific paper

The recently discovered microquasar XTE J1748-288 show spectral differences between the very high, high, and low state. ASCA and RXTE observations show prominent iron line(s). We propose to observe with HETG for a 140ks total exposure over these 3 phases in order to characterize the X-ray spectral features and resolve presently unknown lines for these states. We will also look for emission lines from any X-ray jet, and P-Cygni profiles indicative of a disk-wind. This will be compared to previous Chandra observations of similar energetic systems. We were awarded time in the last Chandra cycle for this proposal but did not trigger on the TOO. The source has remained off.

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