We present the results of our optical identifications of four hard X-ray sources from the Swift all-sky survey .
We obtained optical spectra for each of the program objects with the 6-m BTA telescope ( Special Astrophysical Observatory , Russian Academy of Sciences , Nizhnii Arkhyz ) , which allowed their nature to be established .
Two sources ( ( SWIFT J2237.2+6324 and SWIFT J2341.0+7645 ) are shown to belong to the class of cataclysmic variables ( suspected polars or intermediate polars ) .
The measured emission line width turns out to be fairly large ( FWHM \sim 15 - 25 \buildrel { } _ { \hskip { 0.5 pt } \circ } \over { \mathrm { A } } ) , suggesting the presence of extended , rapidly rotating ( v \simeq 400 - 600 km/s ) accretion disks in the systems .
Apart from line broadening , we have detected a change in the positions of the line centroids for SWIFT J2341.0+7645 , which is most likely attributable to the orbital motion of the white dwarf in the binary system .
The other two program objects ( SWIFT J0003.3+2737 and SWIFT J0113.8+2515 ) are extragalactic in origin : the first is a Seyfert 2 galaxy and the second is a blazar at redshift z = 1.594 .
Apart from the optical spectra , we provide the X-ray spectra for all sources in the 0.6 - 10 keV energy band obtained from XRT/Swift data .

\englishkeywords X-ray sources , cataclysmic variables , white dwarfs , active galactic nuclei