Authors: V.A. Marsakov , Yu.G. Shevelev , . ... Systematic effects of random errors in distances and reddening, metallicity and luminosity indices of F stars from catalogues with photometry are investigated. ... Исследуется систематические эффекты случайных ошибок в определениях расстояний, покраснений, индексов металличности в светимости F -звезд из каталогов с -фотометрией. ...

... The author of the cover picture is Vasilisa Verkhodanova. The picture symbolizes our perception of the world. The modified emblem of the SAO unifying the 6-m optical telescope and the raditelescope RATAN-600 of SAO RAS is placed in the center of the radio galaxy isophotes. From the one hand, we can investigate the properties of radio galaxies with these (and other) telescopes, and try to study physical processes providing their activity. ...

... 1.7 GSC 084 Pulkovo Obs., 0.33 15 x 15' 1.0" 7 34 0.179 0.307 Normal Asgr. 3.0 UCAC 118 Slovakia, 0.57 14 x 10' 1.7" 3 12 0.090 0.145 Modra 3.3 USNO 127 Germany, 0.19 30 x 20' 2.4" 3 15 0.151 0.087 Bornheim 0.8 GSC 168 34 200 0.282 0.315 291 USA,Kitt Peak, 1.8 390 x 30' 1.0" 1 5 0.143 0.144 Spacewatch II 4.7 USNO 300 Japan, 0.5 78 x 78' 2.3" 7 36 0.420 0.447 Bisei Center 1.3 ACT 461 Hungary, JATE 0.60 28 x 19' 1.1" 6 22 0.124 0.153 Asteroid Surv. ... Polynesia 1.0 UCAC F85 Tiki Obs., ...

Optimized MASS device for synchronous measurements with Paranal DIMM. ... System 1.2.2 Fabry lens . ... 3.2 Device alignments at the telescop 3.2.1 Fabry lens p osition . ... Optical layout of MASS device in ZY plane . Optical layout of the MASS device in ZX plane MASS segmentator . ... Other values are explained in text. working entrance pupils for the MASS devices can b e defined in reverse light path as the images of these pupil stops pro duced by the Fabry lens + telescop e optical system. ...

StarShine-3: . ... The satellites are covered by nearly 1000 small, front-surface aluminum mirrors that are machined by technology students in Utah and polished by tens of thousands of students all over the world. ... And this is only small story about it. ... We will be able to measure the angular position of that satellite by observing sunlight flashes from small mirrors mounted on the surface of the satellite, as it passes across the starry sky before sunrise and after sunset.. ... Starshine 3 . ...

... 000, 1­13 (2010) Printed 21 September 2011 A (MN L TEX style file v2.2) A universal ultraviolet-optical colour­colour­magnitude relation of galaxies I1gor V. Chilingarian1,2, and Ivan Yu. ... Received 2011 Sep 15; in original form 2011 Feb 6 ABSTRACT The bimodal galaxy distribution in the optical colour­magnitude diagram (CMD) comprises a narrow "red sequence" populated mostly by early-type galaxies and a broad "blue cloud" dominated by star-forming systems. ...

... These Facts and Questions pages mainly tell you how to use the Aberrator-interface and also explain the nature of the aberrations. ... Airy disc: the brightest spot of light when you look at a star in focus. This disc can contain a maximum of 84% of all the light that arrives from a star (perfect refractor telescope). MCT : Maksutov-Cassegrain telescope. A closed-tube mirror-telescope with a secondary obstruction. Less common than the SCT, this telescope uses a corrector (real glass). ...

... Theoretical Astrophysics, data analysis and interpretation, . ... PhD 1994 in Astrophysics . ... Department Number . 01 (Theoretical Astrophysics) . ... Astro Space Center . ... Telephone Number . 7(095) 333 3366 . FAX Number . 7(095) 333 2378 . ... abelob@lukash.asc.rssi.ru . ...