  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.
