Swift observations of Circinus X-1

Details Swift observations of Circinus X-1 Swift observations of Circinus X-1

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2650....1p&link_type=abstract

The Astronomer's Telegram, #2650

Astronomy and Astrophysics

Astronomy

1

X-Ray, Request For Observations, Binaries, Neutron Stars

Scientific paper

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.

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