Optical identifications of five INTEGRAL hard X-ray sources in the Galactic plane
Bikmaev, I. F.; Sunyaev, R. A.; Sakhibullin, N. A.; Sazonov, S. Yu.; Revnivtsev, M. G.; Burenin, R. A.; Pavlinsky, M. N.
Russia, Germany
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.