Swift XRT Observations of Circinus X-1
Abstract
We report on a series of observations of the neutron star X-ray binary Circinus X-1, taken by Swift between 2 Jan 2004 until 1 August 2007. The observations were fit with single-component power-law and blackbody models. In both sets of fits, the column density of (partly interstellar) low- energy absorption was allowed to vary because Circinus X-1 is known to have a variable wind. The distance was assumed to be 8 kpc (Lei et al.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- August 2008
- Bibcode:
- 2008ATel.1656....1P
- Keywords:
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- X-ray;
- Binaries;
- Neutron Stars