An HETGS Observation of Extreme Activity in 4U 1630-47
Abstract
The black hole candidate 4U 1630-47 recently entered an extremely bright, active state in its outburst, with X-ray flux varying by a factor of 4 on timescales of 1 day (mean flux ~0.3 Crab) and strong hard X-ray emission (as seen by MAXI, Swift/BAT). Our recent HETG/Suzaku observations of the source in a soft, steady state at 50% lower flux revealed deep absorption lines from an extremely massive disk wind. The new active state represents an excellent opportunity to study how such massive winds respond to strong X-ray variability and state changes, which have never been probed in 4U 1630-47. Our proposed 20 ks CC-mode observation will reveal any long- and short-term modulation in the massive disk wind, while additionally providing simultaneous probes of any rapid X-ray variability and changes in the X-ray continuum.
- Publication:
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Chandra Proposal
- Pub Date:
- September 2011
- Bibcode:
- 2011cxo..prop.3513N