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Swift observations of IGR J17419-2802

ATel #617; J. A. Kennea, D. N. Burrows, J. Nousek (PSU) and N. Gehrels (GSFC)
on 4 Oct 2005; 01:57 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Jamie A. Kennea (kennea@astro.psu.edu)

Subjects: X-ray, Transient

Referred to by ATel #: 744, 745, 755

At 16:05:16 UT on October 3rd, 2005 Swift began a Target of Opportunity observation of the INTEGRAL discovered X-ray transient IGR J17419-2802 (ATEL #616). Analysis of data from this observation shows a bright previously uncatalogued X-ray point-source in the field at the following coordinates: RA = 17:41:56.4, Dec = -28:01:53.0 (J2000), with an estimated uncertainty of 8 arcseconds radius (90% containment). This position is 27 arcseconds from the center of the 2 arcminute INTEGRAL error circle given by Grebenev et al. (ATEL #616).

During the observation the flux from this source flux is at a constant level of 3.6 x 10^-11 erg/s/cm^2 (0.2 - 10 keV), uncorrected for absorption. There is no evidence for variability over the length of the observation (2 ks exposure taken over a period lasting 5.5ks).

The spectrum is well fit by an absorbed power law, with N_H = 1.4 +/- 0.3 x 10^22 cm^-2 and a photon index of 1.6 +/- 0.3. The level of absorption is consistent with the source being at the Galactic Center. Assuming a distance of 8.5 kpc, the X-ray Luminosity of this source is ~1.2 x 10^34 erg/s (0.2 - 10 keV), corrected for absorption.

We note that 2 objects in the 2MASS catalogue lie 4.6 arcseconds and 5.9 arcseconds from the center of the XRT error circle, with magnitudes of J=14.0 and J=13.4 respectively.