Swift observations of Circinus X-1
Abstract
After the recent detection of an X-ray brightening (ATel #2608), Swift has observed the LMXB, Cir X-1, starting on 2010 May 27.827 (UTC; MJD 55343.826), for a total exposure time of 4.5ks. Considering the ephemeris calculated by Clarkson et al. 2004, the Swift observations we report here took place in the proximity of the predicted epoch of the X-ray dip (MJD 55346.7+/-2.8). During this interval the Swift XRT count-rate was stable within 20% from the average.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- May 2010
- Bibcode:
- 2010ATel.2650....1P
- Keywords:
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- X-ray;
- Request for Observations;
- Binaries;
- Neutron Stars