Identifications of five INTEGRAL sources through optical spectroscopy
Butler, Suzanne C. and Tomsick, John A. and Chaty, Sylvain and Heras, Juan A. Z. and Rodriguez, Jerome and Walter, Roland and Kaaret, Philip and Kalemci, Emrah and Özbey, Mehtap (2008) Identifications of five INTEGRAL sources through optical spectroscopy. (Submitted)
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) is discovering hundreds of new hard X-ray sources, many of which remain unidentified. We report on optical spectroscopy of five such sources for which X-ray observations at lower energies (0.5–10 keV) and higher angular resolutions than INTEGRAL have allowed for unique optical counterparts to be located. We find that IGR J16426+6536 and IGR J22292+6647 are Type 1 Seyfert active galactic nuclei (with IGR J16426+6536 further classified as a Seyfert 1.5) which have redshifts of z = 0.323 and z = 0.113, respectively. IGR J18308–1232 is identified as a cataclysmic variable (CV), and we confirm a previous identification of IGR J19267+1325 as a magnetic CV. By comparing the spectrum of IGR J18214–1318 to colors of various types of stars, we conclude that it is probably a high mass X-ray binary.
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