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Swift-XRT follow-up of the unidentified INTEGRAL source: IGR J08282-3736

ATel #3294; A. Malizia, R. Landi, L. Bassani (INAF IASF-Bologna), A. Bazzano (INAF IASF-Roma) A. J. Bird (University of Southampton), N. Gehrels (NASA/GSFC), J. A. Kennea (PSU)
on 19 Apr 2011; 10:21 UT
Credential Certification: Raffaella Landi (landi@iasfbo.inaf.it)

Subjects: X-ray, Gamma Ray, Binary

In this telegram we report the X-ray follow-up observations performed with Swift-XRT of the unidentified INTEGRAL source IGR J08282-3736 listed in Bird et al. 2010 (ApJS, 186, 1).

IGR J08282-3736 has already been optically classified as a HMXB by Masetti et al. 2010 (A&A, 519, 96) in the hypothesis that the emitting line star SS188 (also 1RXS J082615.4-373610) was the counterpart of the INTEGRAL source. The XRT follow up observations now confirm this hypothesis and provide the X-ray spectral parameters of this source. XRT detected IGR J08282-3736 at very high signal-to-noise ratio both in the extended 0.3-10 keV band (16.5 sigma) and at higher energies >3 keV (12 sigma). The X-ray position is R.A.(J2000) = 08h 26m 13.87s and Dec.(J2000) = -37d 37m 11.03s with a positional uncertainty of 3.97 arcsec. The XRT data are consistent with an absorbed power law spectrum having photon index Gamma = 2 and an intrinsic column density of 1.5 [+1.5, -0.0] x 1022 cm-2. The 2-10 keV flux is at about 10-11 erg cm-2 s-1.