========================================================================== I/119 Southern Durchmusterung (Schoenfeld+ 1886) The following files can be converted to FITS (extension .fit .fit.Z .fgz) sd.dat sdchg.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/119 ==========================================================================
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Beginning of ReadMe : I/119 Southern Durchmusterung (Schoenfeld+ 1886) ================================================================================ Bonner Sternverzeichniss, vierte Sektion, Schoenfeld E. <Astronomische Beobachtungen auf der Sternwarte der Koeniglichen Rheinischen Friedrich-Wilhelms-Universitat zu Bonn 8, Part IV (Bonn: Adolph Marcus) (1886)> =1886BD....C......0S ================================================================================ ADC_Keywords: Surveys ; Durchmusterungen Description: The Southern Durchmusterung (SD) was computerized at the Centre de Donnees Astronomiques de Strasbourg and at the Astronomical Data Center at the National Space Science Data Center, NASA/Goddard Space Flight Center. Corrigenda listed in the original SD volume and published by Kuestner and Sticker have been incorporated into the machine file. In addition, one star indicated to be "missing" in a published list, and later verified, is flagged so that it can be omitted from computer plotted charts if desired. Stars deleted in the various errata lists have been similarly flagged, while those with revised data are flagged and listed in a separate table. This catalog covers the zones -02 to -23 degrees. Introduction: The Southern Durchmusterung (SD, Schoenfeld 1886, Becker 1949, Schmidt 1967) is a visual survey of stars in the declination zones -02 to -23 degrees, completed as an extension to Argelander's (1859-62) monumental Bonner Durchmusterung (BD). Schoenfeld's survey was carried out using the same methods as had been used for the BD, which Schoenfeld had helped to compile as one of Argelander's assistants. The goal of the survey was to extend the BD to declination -23 deg (a plan originally adopted by Argelander) with approximately the same magnitude limits, although the primary instrument was of larger aperture (159 mm) than the 78-mm telescope used for the BD. Thus, whereas the BD magnitude estimates extend to 9.4 mag with all fainter stars assigned a magnitude of 9.5, the SD magnitude estimates extend to 9.9 mag with all fainter stars assigned a magnitude of 10. As with the BD, the SD contains a rather large number of stars fainter than 10.0 mag and even occasionally as faint as 11 mag. Positions are given to the nearest 0.1 sec in right ascension and 0.1 arcmin in declination as in the BD. The document originally prepared by the ADC (adc.doc) contains substantial additional information.