Swift XRT Observation of AX J1749.1-2733
ATel #1039; Albert K. H. Kong (MIT)
on 1 Apr 2007; 07:24 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Albert Kong (akong@cfa.harvard.edu)
Subjects: X-ray, Request for Observations, Transient
We analyzed a 4.6 ks Swift XRT observation of AX J1749.1-2733
currently in outburst (ATel#1035) taken on 2007 March 30 and obtained
a refined X-ray position of the source. The source is the only bright
X-ray object in the field and is located at R.A.=17h49m06.8s,
Decl.=-27:32:31.5 (J2000) with an estimated uncertainty of 3.8 arcsec
(90% confidence radius). The Swift position is 30 arcsec from the
ASCA position (Sakano et al. 2002). Since the nominal 90% positional
error radius of the ASCA observations is 50 arcsec, the Swift X-ray
source is consistent with AX J1749.1-2733. The energy spectrum of the
source can be fitted with an absorbed power-law model with N_H=1.9+/-0.9E23
cm^-2 and a photon index of 2.1+/-1.2 (90%). The absorbed 2-10 keV flux is 6E-12
erg/cm^2/s. The 2-10 keV lightcurve does not show decay although some variability can be seen.
Optical and infrared observations are encouraged to locate the
optical/IR counterpart.
