- Variability in the X-ray Warm Absorber in GX 339-4
- The astronomer's telegram
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
We have previously reported evidence for a Seyfert-like warm absorber in the stellar-mass Galactic black hole GX 339-4, based on a Chandra/HETGS spectrum obtained during a 75 ksec observation during its 2002-2003 outburst starting on 2003 March 17.8 . The ionized absorption lines detected with this observation were strong, but showed little variability on the timescale of the observation. Variability is perhaps the most important property for ascribing X-ray absorption lines to an accreting source, rather than to absorption in the ISM (which is also a possibility for GX 339-4).
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