Swift Observations of Swift J1357.2-0933
Abstract
The newly discovered X-ray transient source Swift J1357.2-0933 (Krimm et al., ATel #3138) was observed by Swift on 1 Feb 2011 (MJD 55593) and 2 Feb 2011. It was detected as a strong source in both Swift/XRT and UVOT. The XRT observed in Photon Counting mode on 1 Feb 2011 and a position was determined at: RA (J2000): 13:57:16.92 = 209.32049 (deg) Dec (J2000): -09:32:39.3 = -9.54424 (deg) 90% Error radius: 2.1" The 2 Feb 2011 observation was in Windowed Timing mode and the data are well fitted by an absorbed power-law model (Reduced chi2 = 1.06) with the following parameters: N_H = 1.2 ± 0.7 x 1020 cm-2 Gamma = 1.56 ± 0.03 Flux (0.3-10 keV) = 4.2 ± 0.1 x 10-10 erg/s/cm-2 There is no evidence of any lines or other deviations from a smooth spectrum.
- Publication:
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The Astronomer's Telegram
- Pub Date:
- February 2011
- Bibcode:
- 2011ATel.3142....1K
- Keywords:
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- X-ray;
- Binary;
- Transient