Investigating the optical counterpart candidates of four integral sources localized with Chandra
Özbey Arabacı, Mehtap and Kalemci, Emrah and Tomsick, John A. and Halpern, Jules and Bodaghee, Arash and Chaty, Sylvain and Rodriguez, Jerome and Rahoui, Farid (2012) Investigating the optical counterpart candidates of four integral sources localized with Chandra. (Accepted/In Press)
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We report on the optical spectroscopic follow up observations of the candidate counterparts to four sources detected by INTEGRAL: IGR J04069+5042, IGR J06552-1146, IGR J21188+4901 and IGR J22014+6034. The candidate counterparts were determined with Chandra, and the optical observations were performed with 1.5-m RTT-150 telescope (TUBITAK National Observatory, Antalya, Turkey) and 2.4-m Hiltner Telescope (MDM Observatory, Kitt Peak, Arizona). Our spectroscopic results show that one of the two candidates of IGR J04069+5042 and the one observed for IGR J06552-1146 could be active late-type stars in RS CVn systems. However, according to the likelihood analysis based on Chandra and INTEGRAL, two optically weaker sources in the INTEGRAL error circle of IGR J06552
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