Abstract
The results of optical identifications of five hard X-ray sources in the Galactic plane from the INTEGRAL all-sky survey are presented. The X-ray data on one source (IGR J20216+4359) are published for the first time. The optical observations were performed with the 1.5-m RTT-150 telescope (Turkish National Observatory, Antalya, Turkey) and the 6-m BTA telescope (Special Astrophysical Observatory, Nizhny Arkhyz, Russia). A blazar, three Seyfert galaxies, and a high-mass X-ray binary are among the identified sources.
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Original Russian Text © I.F. Bikmaev, R.A. Burenin, M.G. Revnivtsev, S.Yu. Sazonov, R.A. Sunyaev, M.N. Pavlinsky, N.A. Sakhibullin, 2008, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2008, Vol. 34, No. 10, pp. 723–733.
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Bikmaev, I.F., Burenin, R.A., Revnivtsev, M.G. et al. Optical identifications of five INTEGRAL hard X-ray sources in the Galactic plane. Astron. Lett. 34, 653–663 (2008). https://doi.org/10.1134/S1063773708100010
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DOI: https://doi.org/10.1134/S1063773708100010