Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...

A forthcoming mutual events of planets and astrometric radio sources . ... Radio astronomy observations of close approaches of the Solar System planets to compact radio sources as well as radio source occultations by planets may be of large interest for planetary sciences, dynamical astronomy, and testing gravity theories. ... close approach, radio source, VLBI observation, mutual events. ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

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... The SMS program is a critical endeavor to investigate whether the predictions of standard cold dark matter cosmology are consistent with the observed matter distribution in the Milky Way halo. It is the deepest, most extended search for optically elusive dwarf satellite galaxies and tidal streams to date, covering the entire Southern hemisphere. ... However only a few dwarf satellites have been found around the Milky Way to date - 22 dwarfs compared to 500-10,000 predicted by theory (Klypin et al. ...

... Meta Index / Home Page / Usage and Examples Here is an example illustrating how to pass an externally-created detector map (section 7.3.2 ) to the task: . ... Generates a dataset ancillaryfile.ds , weighting the arf spatially using the first array found in the dataset detmap.ds . ... An ARF for an extended source is generated. ... destruct=false withfilteredset=true . ... withxranges=true ximagemin=-1500 ximagemax=1500 withyranges=true . yimagemin=-1500 yimagemax=1500 imagebinning='imageSize' . ...

Pulkovo NEO Page . ... NEA Accuracy Estimation . ... The estimation of accuracy of the current CCD observations of asteroids and comets is constantly performed at Pulkovo Observatory. ... The (O-C) values, so called "Observed" minus "Calculated" positions, characterize numerically the observations of any observatory, both professional and amateur, during a short period (one or several close nights). ... So the (O-C) values for these objects nearly entirely define the errors of observations. ...

... Tonight's Sky . ... Closest northern views of Saturnт??s moon Enceladus . The Cassini spacecraft has begun returning its best-ever views of the northern extremes of Saturn s icy ocean-bearing moon. ... NASA s Cassini spacecraft has begun returning its best-ever views of the northern extremes of Saturn s icy ocean-bearing moon Enceladus. ... Cassini s final close Enceladus flyby will take place on December 19 when the spacecraft will measure the amount of heat coming from the moon s interior. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Site . ... Commanding . ... In a typical robotic observing scenario, each afternoon, a telescope control computer obtains a set of objects to observe from its home institution from a command or script file. ... The file is then transferred to the telescope control computer at the Winer Observatory in Sonoita. ... The Iowa control computer then begins processing the telrun.sls file. ... 2013 Winer Observatory. ...

Apr 13 2015 Corvus - The Crow Observed: No Object NGC IC IC IC NGC IC IC IC NGC 4263 3819 3824 3825 4726 3834 3833 3838 4802 Her Type Non-Existent Sb Non-Existent Non-Existent Non-Existent Non-Existent S0 Non-Existent Non-Existent Non-Existent Non-Existent S0 Mag Alias/Notes 12.6 NGC 4265 MAC1250-1422 very close by MAC 1250-1422 very close by MAC 1250-1428 in the area 14.8 NGC 4740 IC 3834 ... Glxy SB(r)0/a Glxy SB(s)m pec? ...

... The first task assumes the searching for chemical composition and sizes of particles which give the wavelength dependence of the extinction efficiencies close to the observed dependence of . Figure 7: Wavelength dependence of the extinction efficiency factors for homogeneous spherical particles of different sizes consisting of astronomical silicate and amorphous carbon. The dashed segment shows the approximate wavelength dependence of the mean galactic extinction curve at optical wavelengths. ...

Disastrous earthquakes happen 100 to 200 times a year. ... There is a chance that the data of ionospheric plasma observations hold an answer to the latter question. Satellites and ground-based facilities may detect earthquake precursors in the ionosphere a few hours or days before the main shock. ... ULF "Hz"-oscillations have been recorded several hours before the main shock in a narrow magnetic field tube (40...100 km along the satellite trajectory) conjugated with epicenter of the earthquake. ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 13 - 19.07.2015, Forecast on 20 - 27.07.2015, Carrington Rotations 2165, 2166 (17,64.06; 14,84.07.2015) SUNSPOT-FORMING ACTIVITY OF THE SUN AT THE AVERAGE LEVEL WAS CLOSER TO THE LOW. ... FLARE ACTIVITY WAS AT THE LOW LEVEL ON JULY, 14, 18, 19.07 AND AT THE VERY LOW LEVEL IN OTHER DAYS. ... ACCORDING TO THE DATA FROM SOHO AND STEREO CORONOGRAPHS, >34 CMEs, TWO WERE "PARTIAL HA- LO II" TYPE (angular width 90 - 180 deg.) ... CME AT 19.07. ...

Next: NICMOS/HST H-band (F160W) Images Up: NICMOS Science Previous: HST NICMOS Observations of . ... Observations of P . ... The NICMOS team has devised a comprehensive program of observations of the Galactic Center. ... Data in hand give a first look at variability and a detailed look at the search for the tip of the main sequence will be discussed where NICMOS has demonstrated adequate sensitivity and photometric precision to identify likely O8-B1 stars at the Galactic Center. ...

Subatomic resolution on Cu(014)-O . 3nm x 3nm STM image of the Cu(014)-O 0.5ML surface measured with MnNi tip. ... This result has been discussed in Phys. Rev. Letters, 98, 206101 (2007) (A.N.Chaika, V.N.Semenov, S.S.Nazin, S.I.Bozhko, S. Murphy, K. Radican, I.V.Shvets, "Atomic Row Doubling in the STM Images of Cu(014)-O Obtained with MnNi Tips"). Image courtesy of A.Chaika. The image was measured in constant current mode using RT STM GPI-300. Copyright ИФТТ РАН, ЛСПП, 2006-2007 . ...

... 13, Moscow 119992, Russia, 2 University of Milano-Bicocca, Piazza della Scienza 3, Milano 20126, Italy, 3 University dell'Insubria, via Vallegio 11, Como 22100, Italy, 4 University of Padova, via Marzolo 8, Padova 35131, Italy We present Log N { Log S distribution for close-by young isolated neutron stars. ... 1 Introduction Neutron stars (NSs) and black holes (BHs) are among the most interesting astrophysical sources. ... 2 Isolated neutron stars In this section we discuss isolated NSs. ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

BRIGHT OPTICAL FLASH FROM GRB 060117 - AN EXAMPLE OF EVENT DETECTED WITH OMC CLASS INSTRUMENT Д Д Petr Kubanek1,2 , Martin JelД inek3 , Michael Prouza4,5,6 , Rene Hudec1 , and Martin Nekola1 1 Astronomicky ustav Akademie ved Ceske republiky, Ondrejov, Czech Republic ДД Д 2 INTEGRAL Science Data Center, Chemin d'Ecogia 16, Versoix, Switzerland 3 Instituto de AstrofД isica de AndalucД (IAA-CSIC), Granada, Spain ... INTEGRAL GRBs are detected during -ray observations of knows sources. ...

. Comment on J2250+1419 . Resolved: the source is extended, with about 0.15 Jy correlated flux density observed with the shortest VLBA baselines. It was not detected at 2.3 GHz by Preston et al. (1985). Augusto, Wilkinson & Browne (1998) find it partially resolved with MERLIN at 5 GHz. See Figure 3. VLBApls home page . Last modified: 16 Oct 2000

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