ИСТИНА

We present results of searching for variable stars in the field of beta Cassiopeiae on digitized photographic plates of the Sternberg Astronomical Institute’s plate stacks. The negative astronomical plates of 30 x 30 cm size (that corresponds to 10°x 10°field of view) were obtained with the 40cm astrograph in 1940–90s. We have discovered and investigated 1011 new variable stars and found 263 previously known variable stars. New variables include 682 eclipsing binaries of different subtypes, 5 BY Draconis stars, 5 classical Cepheids and 4 Cepheids of the Galaxy’s spherical component, 3 delta Scuti stars, 15 high-amplitude delta Scuti stars (HADS), 33 RR Lyrae stars, 1 RS CVn star, 44 semi-regular red variables, 207 irregular variables (65 yellow or white stars and 142 red stars of LB type), and 12 variable stars that need confirmation and more careful study with CCD. Some of discovered stars initially were marked as suspected, for now more than 20 of them have accurate elements derived from our CCD-photometry. We considered only about 400 plates of interest from the 22500 pieces collection.