Swift/XRT localization of IGR J19149+1036
ATel #3326; E. Bozzo, C. Ferrigno, L. Pavan, R. Walter (ISDC, Switzerland), L. Stella (INAF-OAR, Italy)
on 5 May 2011; 10:12 UT
Credential Certification: E. Bozzo (email@example.com)
Subjects: X-ray, Gamma Ray, AGN, Binary, Black Hole, Neutron Star, Transient
The field around the recently discovered IGR J19149+1036 (Pavan et al., 2011, A&A, 526, 122)
was observed by Swift/XRT twice, on 2010 Dec. 5 and 2011 Feb. 17.
The total exposure time was 2.1 ks. In both observations, a single
point-like source was detected within the IBIS/ISGRI
error circle. By summing up all the available XRT data we estimated
the best position at:
RA = 19h14m56.73s
Dec = +10:36:38.11
(J2000), with an associated uncertainty of 3.7 arcsec.
This position is still consistent with IGR J19149+1036 being associated to the
Einstein source 2E 1912.5+1031.
The XRT spectrum could be reasonably well fit by using an absorbed
power-law model with N_H=(6.5+/-3.0)E+22 cm^(-2), and
Gamma=1.8+/-0.8. The 1-10 keV X-ray flux is 1.8E-11 erg/cm^(2)/s
(uncorrected for absorption). This would correspond to a flux in the
17-80 keV energy band compatible (to within the uncertainties)
with that measured by INTEGRAL.
Within the XRT error circle, we identify J19145680+1036387
(J=14.34+/-0.03, H=12.41+/-0.03, K=11.53+/-0.02) as the most
likely 2MASS counterpart to IGR J19149+1036.
By using the on.-line tool
we noticed that IGR J19149+1036 is also
detected by the JEM-X telescope on-board
INTEGRAL at a significance level of 6.2 sigma.
The estimated 3-10 keV X-ray flux is