The Astronomer's Telegram
Telegram Index | Search
To The Parent Site

[ Previous | Next ]


Swift Observations of the X-ray Dipper XB 1254-690

ATEL # 1712; S. Moore, K. J. Perry, J. M. Miller (University of Michigan)
on 10 Sep 2008; 17:17 UT
Password Certification: Jon Miller (jonmm@umich.edu)

Subjects: X-ray, Binaries, Neutron Stars

We report on the X-ray dipping source XB 1254-690 as observed in five SWIFT/XRT exposures. These observations occurred on 2007 June 10, August 7, August 8, October 29, and 2008 March 2. Using XSPEC v11, we fit the spectra with a power-law plus blackbody model in the 1.0-10.0 keV band. We allowed the neutral hydrogen column density to float and obtained values varying from 0.35 +/- 0.1 E+22 to 1.9 +/- 0.1 E+22 (90 percent confidence errors). The power-law indices range from 0.3 +/- 0.4 to 2.1 +/- 0.8. The blackbody temperature (kT) varied slightly from 0.62 +/- 0.05 keV to 1.8 +/- 0.1 keV. The total flux ranged from 0.33 +/- 0.05 E-9 cgs to 19.7 +/- 0.02 E-9 cgs. The marked variability observed is characteristic of dipping sources.

Figures supporting this atel can be found here.


[ Telegram Index ]

R. E. Rutledge , Editor
ATEL Mirror v1.0 Updates