... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

... Canadian Astronomy Data Center, DAO/NRC . SkyCat is a tool that combines image visualization with access to astronomical catalogs and data archives. SkyCat uses a standardized URL syntax to access a large number of data sources on the net. ... More information on SkyCat can be found at the SkyCat Web site. The ESO SkyCat Tool includes the following features: . ... PostScript color printing of the display (image + graphics), . ... overlay catalog sources on an image, . ...

... The stars examined here were primarily culled from two lists of X--ray sources in Orion. ... The second region is two degrees in extent east--west and ten degrees north--south with Orionis being near the northern edge. ... In the end, two main regions were chosen for monitoring: stars near Orionis and stars northwest of the belt of Orion. ... The PSPC identified 22 sources within 15 of Orionis in addition to the sources listed in Table 1 , giving a total of 85 X--ray sources in the Orionis region. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... The actual cross-correlations were done as follows: north of WGACAT was correlated with the GB6 catalog with a correlation radius of one arc minute. ... We therefore cross-correlated WGACAT with the GB6 and PMN radio catalogs with a 1.5 arcmin radius. ... As a result of this experiment, we then added to the WGACAT/PMN candidate list the 29 unclassified sources obtained from the 1.5 arcmin correlation and having PSPC offsets arcmin, ratio between X-ray/radio offset and positional error , and . ...

... 173Wall Peacock We catalogue the brightest extragalactic radio sources at 2.7 GHz. ... These data were originally presented in Wall and Peacock, MNRAS, 216, 173. The values in parenthesis include (units, datatype, example). 1 iauname Name of source in IAU convention (char7, example: '0320-37') . ... 3 ra_1950 rad Right ascension of source in radians (B1950) (real, example: 0.876068) . ... 9 alpha Spectral index of source between 2.7 and 5 GHz (real, example: 0.52) . ... Longair, 1975 . ...

... The space station Mir is the most complex and unique vehicle of the twentieth century. ... It is in proposing to UNESCO the procedure of giving to the space station Mir a status of the object of the World cultural heritage of the mankind as a very valuable unique object of the technical culture of the 20th century, and realization of the special project of its preservation. ... Proactive organization work to get in UNESCO the status of the object of the World cultural heritage for the station Mir; ....

Next: CORRELATOR BOARDS Up: OBSERVING PROCEDURES Previous: Frequency Switching . ... Continuum sources in the list used for flux density calibration were selected in an ad-hoc fashion from a variety of places, but primarily from Kuehr et al (A&AS, 45, 367, 1981), the compendium of linearly polarized sources by Tabara & Inoue (A&AS, 39, 379, 1980), and an unpublished list of unconfused calibrator sources prepared from the NVSS survey by Jim Condon and Qi Feng Yin. ... Board 0 . ...

... The object is remarkable because of its low estimated mass and age and because it is associated with a mid-infrared source, an indication of a surrounding dusty disk. Based on the comparison of our spectrum with similar spectra of field M-dwarfs and atmospheric models, we obtain revised estimates of the spectral type, effective temperature and luminosity of the central object. ...

home resources > books . SEARCH ASP SITE: Match ALL words Match ANY word . ... Buy The Black Hole at the Center of our Galaxy at Amazon.com! Reviewed by Terrell Kent Holmes . In 1974 astronomers discovered a bright radio source at the center of the Milky Way Galaxy, in the direction of the constellation Sagittarius. It was an unknown quantity then, but astronomers now know that the object is a supermassive black hole causing a maelstrom of activity at the galactic center. ...

... A classic test of the standard orientation-dependent unified schemes has been the assessment of the quasar fraction in complete radio samples. Using a sample of giant radiosources (projected size ) out to redshifts of , I demonstrate that the fraction of broad line objects is smaller than that obtained by comparison of quasars and galaxies in the 3CR sample. ... The sample . ... Giant radio sources ( ) have traditionally been of great interest for several reasons. ...

... Files . ... File List . File Members . lattices . Lattices . ... 00001 //# LCEllipsoid.h: Define an N-dimensional ellipsoidal region of interest 00002 //# Copyright (C) 1997,1998 00003 //# Associated Universities, Inc. ... 00085 LCEllipsoid ( const IPosition & center , Float radius, 00086 const IPosition & latticeShape ); 00087 00088 // Construct an N-dimensional sphere with the given center and 00089 // radius (in pixels). ... Generated on Fri Sep 3 2010 13:07:07 for casacore by 1.7.1 ...

... X-Rays From The Galactic Center . ... CXO , NASA Explanation: Exploring quasars and active galaxies in the distant universe, astronomers have come to believe that most galaxies have massive black holes at their centers. ... Other individual X-ray sources are also present in the picture which spans about 10 light-years at the distance of the galactic center . ... Publications with keywords: black hole - Galactic Center - X-ray . Publications with words: black hole - Galactic Center - X-ray . ...

... Ephemerides . ... Natural Satellites Data Center service. ... Please complete the form below, fields marked with * should be filled. See List of keywords for object List of keywords for subject Main journals list . ... by Keywords Title Title, Keywords and Abstract Authors Journal/Livre/Rapport: . ... AND OR NOT Exact sentence (within this field) AND . ... AND OR NOT Exact sentence (within this field) . ... Keywords . ... AND OR NOT Exact sentence . within this field) . ...

... It was found that the Sun lies 9?2 pc above the plane of hte Galactic disk in the direction of North Galactic pole and that F0-F9 stars contribute 0.0035 M /pc 3 to the density of the Galactic disk. ... We used this method to determine the scale height of the subsystem of F stars of the Galactic disk, Z 0 =160?10 pc. ... It is suggested that scale height of the metal-poor stars subsystem is due to the infall of the metall-poor intergalactic gas onto the disk. ...

On the problem of using of the ICRF radio coordinates reference system Lipovka A.A. (1), Lipovka N.M. (1) Center of research for physics, Sonora State University e-mail: nila_lip@mail.ru Bibliography 1. ... Columns 8, 9 are corrections to right ascension and declination, which should be added to coordinates of ICRF2 radio sources, to obtain coordinates of optical objects, with which these radio sources are identified. ... Lipovka .. ... Fig 3 Fig 3 ...

... 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. ...

... See also changes and comments in configure.in # prefix = @prefix@ exec_prefix = @exec_prefix@ DESTDIR = CFITSIO_LIB = ${DESTDIR}@libdir@ CFITSIO_INCLUDE = ${DESTDIR}@includedir@ INSTALL_DIRS = @INSTALL_ROOT@ ${CFITSIO_INCLUDE} ${ CFITSIO_LIB } ${ CFITSIO_LIB }/pkgconfig SHELL = / bin /sh RANLIB = @RANLIB@ CC = @CC@ CFLAGS = @ CFLAGS @ SSE_FLAGS = @SSE_FLAGS@ FC = @FC@ LDFLAGS = $( CFLAGS ) DEFS = @ DEFS @ LIBS = @ ...