Optical Identifications of Five INTEGRAL Hard X-ray Sources in the Galactic Plane Region

TL;DR

This paper reports optical identifications of five hard X-ray sources in the Galactic plane from the INTEGRAL survey, including a newly published X-ray source, revealing diverse object types such as blazars, Seyfert galaxies, and a high-mass X-ray binary.

Contribution

First optical identifications of five INTEGRAL sources, including the first data on IGRJ20216+4359, expanding knowledge of Galactic plane X-ray sources.

Findings

Identification of a blazar, three Seyfert galaxies, and a high-mass X-ray binary.

First-time optical data for IGRJ20216+4359.

Confirmation of source classifications through optical observations.

Abstract

The results of optical identifications of five hard X-ray sources in the Galactic plane region from the INTEGRAL all-sky survey are presented. The X-ray data on one source (IGRJ20216+4359) are published for the first time. The optical observations were performed with 1.5-m RTT-150 telescope (TUBITAK National Observatory, Antalya, Turkey) and 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.