... 9) Oknyanskij V.L. 1994, "Optical-radio time delays in Q0957+561", Odessa Astronomical Publ., ... 11) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", in Proceedings of Int. Conf. ... 1994. 12) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability in NGC4151", Astrophys. and Space Science, 222, p.157. ... 14) Oknyanskij V.L., van Groningen E., 1997, "Optical spectral variability of NGC4151 in 1990", Astronomical and Astrophys. ...

... Catalog . ... This web application is brought to you by the following people (in alphabetical order): . Alexey Sergeev, markup issues . Artemy Tregoubenko , JavaScript code . Elena Glushkova, content management . ... We would like to acknowledge the usage of these open source technologies: . Django , web framework . PostgreSQL , database management system . ... SAMP-Webtools , set of JavaScript tools for SAMP-enabled web applications . Developed by the Team . ...

Pulkovo Database of Observations of Visual Double Stars . ... Catalog of relative positions of visual double stars, based on photographic observations performed since 1960 in Pulkovo on the 26-inch refractor (A.A.Kiselev, O.A.Kalinichenko, O.V.Kiyaeva, N.A.Shakht, L.G.Romanenko, I.S.Izmailov, O.P.Bykov, K.L.Maslennikov, E.A.Grosheva, D.L.Gorshanov), 2010 . ... Enter either ADS or WDS number. Click here to display full list of visual double stars observed at Pulkovo. ADS . ...

Statistics of sunspot activity . The sunspot indices . ... NGDC's observations . The solar regions . ... Average annual indices . ... April . ... April, 2013 . Visual indices of solar activity by National Geophysical Data Center . ... Average . ...

... atmos-2.96.0a.tar.gz . ... application/x-gzip . atmos-2.96.0a.tar.gz.md5 . ... 0.1K . text/plain . atmos-2.96.0a.tar.gz.sha1 . ... 2009-Nov-26 18:15:31 . ... 2010-Apr-06 11:03:37 . ...

. Comment on J1724-0241 . No detection: the source is probably extended. It was not detected at 2.3 GHz by Preston et al. (1985). There is a redshift in SIMBAD (z=0.033) based on a wrong optical identification with a galaxy (Stickel, K hr & Fried 1993). VLBApls home page . Last modified: 16 Oct 2000

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