Swift discovers a probable new transient
ATel #1279; K. L. Page (U. Leicester), J. Tueller (GSFC) and A. P. Beardmore (U. Leicester), on behalf of the Swift team
on 14 Nov 2007; 19:17 UT
Credential Certification: Kim Page (email@example.com)
Subjects: X-ray, Transient
Swift-BAT has detected a probable new galactic transient at a position of
RA, Dec (J2000) = 81.4034, 24.2607 (estimated error radius of 5 arcmin) at the
6-sigma level. Two Swift-XRT observations were performed in 2007 October,
totalling 9.3 ks, and a clear X-ray source was detected. This source,
which is designated SWIFT J052522.48+241331.8, is located at
RA, Dec (J2000): 81.3436, 24.2255
RA, Dec (J2000): 05h 25m 22s.48, 24d 13m 31s.8
with an error radius of 4.0 arcsec (90% containment).
The XRT spectrum can be fitted by an absorbed power-law of Gamma = 1.07
+0.13/-0.06, with NH = (1.5 +/- 0.5)x10^21 cm^-2. The mean count rate is
+/- 0.004 count s^-1, with an observed (unabsorbed) flux of 1.02x10^-11
(1.37x10^-11) erg cm^-2 s^-1 over 0.3-10 keV. There is no sign of
in count-rate between the X-ray observations on 2007-10-12 and 2007-10-18.
This source may have a 17th magnitude optical counterpart (USNO-A2.0 1125-02389994), which is also a 14th magnitude 2MASS source (2MASS J05252270+2413332).