/ftp/cats/I/237



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I/237   ==OBSOLETE version of Catalogue==
30-Jan-2009: See category B (regularly updated): B/wds
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/237
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 4096 Jan 13 2023 [TAR file] -rw-r--r-- 1 cats archive 395 Dec 19 2022 .message -rw-r--r-- 1 cats archive 55 Jan 30 2009 =obsolete= -r--r--r-- 1 cats archive 15423 Oct 26 2012 ReadMe -rw-r--r-- 1 cats archive 2837 Oct 25 2007 +footg5.gif -rw-r--r-- 1 cats archive 56104 Mar 5 2008 +footg8.gif -r--r--r-- 1 cats archive 1908518 Sep 26 1997 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 755 Jan 10 1997 disc.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 147000 Jan 10 1997 notes.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 10256 Jan 11 1997 notesyns.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 28116 Jan 10 1997 refs.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 6271 Jan 10 1997 wds.doc.gz [Uncompressed]
Beginning of ReadMe : I/237 The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996) ================================================================================ The Washington Visual Double Star Catalog, 1996.0 Worley C.E., Douglass G.G. <US Naval Observatory (1996); Astron. Astrophys. Suppl. Ser. 125, 523 (1997)> =1997A&AS..125..523W ================================================================================ ADC_Keywords: Stars, double and multiple ; Positional data Description: The Washington Visual Double Star Catalog, 1996.0 (WDS) is the successor to the catalog of the same name dated 1984 I/107. The WDS is intended to contain all known visual double stars for which at least one differential measure has been published through the end of 1995. It includes a discoverer code, the date of the first and last observations, the number of observations, the position angle and separation for the first and last observation, the magnitudes and spectral types of the components (when available) the proper motion of the system, Durchmusterung numbers of the components and notes for further information. Introduction: The reader is reminded that the WDS is not inclusive of all pairs which have been more casually noted, although it does, in fact, include some of them. The data base upon which the present WDS rests consists of the approximately 180000 measures transferred from the Lick Observatory in 1965, which, with few exceptions, covered the interval 1927-1963, augmented by all subsequent measures (about 118000), and some 154000 pre-1927 means. These latter are the result of a continuing project to build a truly comprehensive and complete data base. Thus, approximately 452000 individual means, representing over a million individual observations, form the basic material from which the WDS is constructed. We have not included a small amount of data because of unresolved questions concerning it. The WDS contains 78100 double stars, counting, as did the IDS, multiple components in the same system as separate pairs. Comparison of the present catalog with its IDS predecessor will reveal that a considerable number (about 1000) of previously catalogued objects have been removed from the WDS in the process of editing the data. The most common reason for removal is that the object is not certainly double. We wish to emphasize that the WDS is not intended to be an "astrometric" catalog in the sense usually employed, but rather is to be considered a finding list for observers, as well as serving as a notification of which objects are known doubles or multiples, along with some basic astrometric and astrophysical parameters. In addition, the WDS offers information on the amount of motion and frequency with which a given object has been observed, which is sufficient, in fact, to provide a basis for the construction of observational programs. Finally, the data can be used (with proper precautions) to analyze certain statistical properties of visual double stars. Of course, as has been true for many years, the individual measures of specific objects are available and will be supplied to requesters provided that the amount of data desired is reasonable. Request for Acknowledgment: If the WDS and associated databases were helpful for your research work, the following acknowledgement would be appreciated: ``This research has made use of the Washington Double Star Catalog maintained at the U.S. Naval Observatory.''