Journal
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
Volume 39, Issue 8, Pages 513-522Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063773713080069
Keywords
X-ray sources; active galactic nuclei; X-ray binaries
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Funding
- Russian Foundation for Basic Research [12-02-01265, 11-02-01328]
- Presidium of the Russian Academy of Sciences [OFN-17]
- Programs of the President of Russia for Support of Leading Scientific Schools [NSh-5603.2012.2]
- Ministry of Education and Science [N8701, N8629]
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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 recordedX-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 similar to 46.674 s that is a member of a high-mass X-ray binary 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.
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