Two New INTEGRAL Sources: IGR J15479-4529 and IGR J16418-4532
ATel #224; J. A. Tomsick and R. Lingenfelter (UC San Diego), S. Corbel (Universite Paris 7 and CEA Saclay), A. Goldwurm (CEA Saclay), and P. Kaaret (Harvard-Smithsonian CfA)
on 30 Jan 2004; 03:34 UT
Credential Certification: John A. Tomsick (firstname.lastname@example.org)
Subjects: X-ray, Black Hole, Cataclysmic Variable, Neutron Star
We report on detections of two new INTEGRAL sources by
the IBIS/ISGRI instrument during a 290 ks observation
of the black hole X-ray transient 4U 1630-47 taken
during 2003 February 1-5.
IGR J15479-4529 is detected at a significance of 17-sigma
with coordinates R.A. = 15h47m.9 and Decl. = -45o29'
(J2000, 2' uncertainty). Its 20-40 keV flux is 3 x 10^-11
erg/cm^2/s, using the current (OSA-3.0) ISGRI response
matrix, and it is detected at a significance of 7-sigma
in the 40-60 keV energy band. The best INTEGRAL source
position is within 3' of the intermediate polar 1RXS
J154814.5-452845, which was strongly detected by XMM-Newton
out to 10 keV (Haberl, Motch, & Zickgraf 2002, A&A, 387, 201),
suggesting a possible association.
IGR J16418-4532 has coordinates R.A. = 16h41m.8 and
Decl. = -45o32' (J2000, 2' uncertainty). In the 20-40 keV
band, it is detected at 17-sigma with a flux of 3 x 10^-11
erg/cm^2/s. This source is close to the Galactic plane
(b = +0.5 degrees), and is one of several INTEGRAL sources
that have been found in the Norma Region.