... An attempt is made to explain light variations in the blue region of the magnetic star CQ UMa by means of a simple oblique rotator model with one extensive circular dark spot centred to the south magnetic pole; Observed variations in v and colours may be explained by a spot covering about 69 percent of a hemisphere, the ratios of luminances (brightness densities) inside and outside the spot being 0.77 and 0 . ...

... 38 CONTENTS Karachentsev I.D., Kopylov A.I., Kopylova F. G. Distance moduli in M 101 group from brightest stars .. Tikhonov N.A., Karachentsev I.D. Maffei 2, a nearby galaxy shielded by the Milky Way.. ... Zhuravkov A.V. , Bartolini C., Guarnieri A., Piccioni A., Zampieri G. Optical behaviour of GRO J0422+32 in different brightness levels ............................................................................. telescope .. ... Cas OB5 .. ... Instrumental facilities of the 6 m telescope .. ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...