Аннотация:We observed the star on 11 nights in 2007-2010 at the Zvenigorod Observatory of the Institute of Astronomy (Russian Academy of Sciences) near Moscow (a Zeiss-600 telescope with a UBV photometer designed by Volkov, with an EMI-9789 photomultiplier); at the Crimean Astrophysical Observatory at Mt. Koshka (Crimea, Ukraine; a Zeiss- 600 telescope and a UBVRI photometer with an Ap-47p CCD chip or a Zeiss-600 telescope and a UBV RI photometer with a VersArray 512UV CCD chip); and at the Stara Lesna Observatory of the Slovak Academy of Sciences (Slovakia; a Zeiss-600 telescope and a UBVR photometer with a Hamamatsu R 2949S photomultiplier). We studied the instrumental photometric systems of all these instruments, which were all found to be close to the standard Johnson UBVRI system, and reduced all our measurements to this system.
(5 data files).