2000/12/05 by J. C. Lee, Lee, J. C., N. S. Schulz +7
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0012111
6 pages, 4 figures, Contributed talk at "X-ray Astronomy 2000" meeting, Palermo, Italy, Sept. 2000. Proceedings to be published in ASP Conference series, eds. R. Giaconni, L. Stella, & S. Serio, 2000
arxiv created 2000/12/05 · arxiv updated 2009/12/01
A Chandra AO1 30ks HETGS observation of the X-ray transient micro-quasar GRS 1915+105 reveals absorption edges and faint line emission over the HETG energy range. We find from a preliminary analysis evidence for prominent neutral K edges associated with iron, silicon, magnesium, and tentatively sulphur. The column densities assuming solar abundances are consistent with ~ few x 1022 cm-2 in excess of the Galactic value, and may point to surrounding cold material associated with GRS 1915+105. Neutral Fe Kα emission, and ionized absorption from Fe XXV and Fe XXVI are resolved. We limit our discussion to the Chandra results.