a Search FO Emission Lines in the Micro-Quasar GRS 1758-258

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Chandra Proposal Id #03400987

Scientific paper

We propose to obtain a high significance, high resolution spectrum of the micro-quasar GRS 1758-258 in order to search for emission lines from possible X-ray jets. As revealed in Chandra/HRC observations, GRS 1758-258 has arcsecond scale extended X-ray emission associated with a core point source. This extended structure changed shape in about a month, evidence for a near-light-speed outflow. In this investigation, we will use the ACIS-S/HETG, supported by concurrent Rossi X-ray Timing Explorer and VLA observations, to search for red- and blue-shifted emission lines. If found, these lines will confirm the presence of relativistic flows in this system and should allow us to constrain the geometry of the system.

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