10th Meeting of the High Energy Astrophysics Division
Los Angeles (CA), USA
2008 March 31st – April 3rd
Chandra Gratings Observations of the Focused Wind in Cygnus X-1/HDE 226868
M. Hanke, J. Wilms, M.A. Nowak, K. Pottschmidt, N.S. Schulz, J.C. Lee, J. Xiang, A. Juett
We present results from a 50ksec observation of the hard state of the
supergiant X-ray binary system Cygnus X-1/HDE 226868 with Chandra's High
Energy Transmission Grating Spectrometer and simultaneous RXTE data.
Performed during superior conjunction of the black hole, the observation
is ideally suited for spectroscopy of the focused stellar wind in the
system. A large number of absorption lines is detected in the X-ray
spectrum.
poster (9.4 MB),
slides (573 kB)