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Redshift of QSO Candidate for IGR J06523+5334

ATel #3186; J. P. Halpern (Columbia U.)
on 23 Feb 2011; 20:51 UT
Credential Certification: Jules Halpern (jules@astro.columbia.edu)

Subjects: Optical, X-ray, AGN, Quasar

Based on independent inspection of a Swift XRT observation of the field of IGR J06523+5334 from 2011 January 10 UT, I observed the suggested optical counterpart of XRT Source #1 (Landi et al., ATel #3185), which is listed in the USNO B1.0 catalog at coordinates (J2000.0) R.A. = 06h 52m 31.407s, Decl. = +53d 31' 31.55", with magnitudes B2 = 18.80, R2 = 18.12, I2 = 17.57. Using the Hiltner 2.4.m telescope on 2011 January 14 UT, I obtained a 20 minute exposure spectrum with the Ohio State Multi-Object Spectrograph (OSMOS) covering the wavelength range 3970-6880 Angstroms with 4 Angstrom resolution. Detection of [O III] 5007,4959 and broad Balmer emission lines at z = 0.301 indicates that this broad-line QSO is a possible identification of IGR J06523+5334, with a 2-10 keV luminosity of ~5.e43 erg/s.