Optical identification of four INTEGRAL sources

ATel #880; Burenin R. (IKI), Mescheryakov A. (IKI), Revnivtsev M. (IKI, MPA), Bikmaev I. (KSU, AST), Sunyaev R. (MPA, IKI)
on 5 Sep 2006; 07:38 UT
Credential Certification: Rodion Burenin (rodion@hea.iki.rssi.ru)

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We report optical spectroscopic identification of four INTEGRAL sources, detected in INTEGRAL all-sky survey (Krivonos et al. 2006). Original astrometric positions of all sources were refined using ROSAT, Chandra or SWIFT/XRT data. Optical data were obtained with Russian-Turkish 1.5-m telescope (RTT-150, Bakirlitepe, TUBITAK National Observatory, Turkey), using TUG Faint Object Spectrograph and Camera (TFOSC).

IGR J03334+3718 --- The source was also detected in ROSAT All-Sky Survey (1RXS J033316.2+371815). These data strongly diminish the positional uncertainty of the source (down to ~= 10 arcsec). The X-ray source can be clearly associated with bright galaxy with star-like nucleus at RA,Dec = 03:33:18.8 +37:18:11 (J2000). The optical spectrum of the galaxy nucleus shows redshifted and broadened H_alpha (blended with NII), H_beta and other Balmer lines and narrow emission lines [OIII] 4959,5007 and others. Using the narrow lines only we measured the redshift z=0.05471. The broad emission lines are typical for Seyfert 1 AGN.

IGR J13038+5348 --- The source was observed by SWIFT/XRT and is associated with the nucleus of bright nearby galaxy MCG +09-21-096, which was also classified as emission line object (SBS 1301+540) in Second Byurakan Spectral Sky Survey (Markarian et al. 1983-1986). The optical spectrum of the source is very similar to that of IGR J03334+3718. It shows redshifted and broadened Balmer lines and narrow emission lines. Using the narrow lines only we measured the redshift z=0.02988. The broad emission lines are typical for Seyfert 1 AGN.

IGR J18048-1455 --- The exact astrometry was obtained using Chandra observations of this field (Mar. 28, 2006): RA,Dec = 18:04:38.96 -14:56:47.3 (J2000). The optical object near this position shows H_alpha emission line of EW=-14 angstroms at zero redshift. This is consistent with a Galactic high mass X-ray binary.

IGRJ20006+3210 --- The source was observed by SWIFT/XRT. The optical counterpart at RA,Dec = 20:00:21.9 +32:11:23 (J2000) shows H_alpha emission line of EW=-10 angstroms at zero redshift. This is consistent with a Galactic high mass X-ray binary.