Identification of Four X-ray Sources from the INTEGRAL and Swift Catalogs

TL;DR

This study identifies four hard X-ray sources from INTEGRAL and Swift catalogs, determining their nature through multi-wavelength spectra, revealing two extragalactic sources, one galactic pulsar, and an uncertain source needing further IR spectroscopy.

Contribution

The paper provides the first identification and classification of four X-ray sources using combined X-ray and optical data, clarifying their astrophysical nature.

Findings

SWIFT J1553.6+2606 is a quasar.

SWIFT J1852.2+8424 comprises two Seyfert 1 galaxies.

IGR J22534+6243 is a Galactic X-ray pulsar with a ~46.674 s period.

Abstract

Four hard X-ray sources from the INTEGRAL and Swift catalogs have been identified. X-ray and optical spectra have been obtained for each of the objects being studied by using data from the INTEGRAL, Swift, ROSAT, and Chandra X-ray observatories as well as observations with the RTT-150 and AZT-33IK optical telescopes. Two sources (SWIFT J1553.6+2606 and SWIFT J1852.2+8424) are shown to be extragalactic in nature: the first is a quasar, while the registered X-ray flux from the second is the total emission from two Seyfert 1 galaxies at redshifts 0.1828 and 0.2249. The source IGR J22534+6243 resides in our Galaxy and is an X-ray pulsar with a period of ~46.674 s that is a member of a high-mass X-ray binary, probably with a Be star. The nature of yet another Galactic source, SWIFT J1852.8+3002, is not completely clear and infrared spectroscopy is needed to establish it.