/ftp/cats/7/167



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VII/167   ==OBSOLETE version of Catalogue==
19-Mar-1998: (by Francois Ochsenbein) See VII/206
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drwxr-xr-x 254 cats archive 8192 Nov 22 11:18 [Up] drwxr-xr-x 2 cats archive 221 May 26 2021 [TAR file] -rw-r--r-- 1 cats archive 246 Mar 19 1998 .message -rw-r--r-- 1 cats archive 50 Mar 19 1998 =obsolete= -r--r--r-- 1 cats archive 7701 Jul 25 2004 ReadMe -r--r--r-- 1 cats archive 167265 Feb 12 1994 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : VII/167 General Catalog of Photometry of Galaxies (Longo+ 1983) ================================================================================ A general catalogue of photometric magnitudes and colors in the U,B,V system of 3,578 galaxies brighter than 16-th V-magnitude (1936-1982) Longo G., de Vaucouleurs A. <University of Texas Astronomy Monographs, No.3 (1983)> ================================================================================ ADC_Keywords: Galaxy catalogs ; Galaxies, photometry Description: (Introduction of published catalogue, summarized by CDS) Details of the integrated photometry of galaxies in the UBV system (generally through circular apertures centered at the nucleus) published prior to 1963 were given in three appendices to the (First) Reference Catalogue of Bright Galaxies (RCBG = RC1). The publication of an updated listing in the Second Reference Catalogue (RC2) has been requested since then. The present catalogue contains no less than 16,680 observations of 3,578 galaxies generally brighter than the 16-th V-band magnitude collected from 150 different sources, including several recent unpublished series from McDonald and Siding Spring Observatories. We excluded only the numerous galaxies fainter than this magnitude, and the numerous observations of the nuclei of Seyfert galaxies and variable N-galaxies through small apertures published after 1972-73 which add little or no new information on the magnitude-aperture curve of the underlying galaxy. In addition to the measured magnitudes and colors, the important notes relative to each observation were extracted from the original publications and/or our own unpublished records. This is necessary for a proper interpretation of the raw data which are often affected by field stars, nearby companion galaxies, centering difficulties, and of course weather conditions. We have generally rejected photographic observations made through undefined apertures and photoelectric observations not directory transformable to the UBV system. the transformation equations adopted for observations not originally in the UBV system are given in Table 1, after RC1 (Tables 10, 11 and 12), RC2 (Table 11) and de Vaucouleurs (1961). Alternative transformations are indicated in the notes to Table 1. (* Table 1 of the published catalogue is not archived here. -- CDS) Altogether the catalogue contains 12,796 observations of 2086 NGC objects, 1059 observations of 303 IC objects, and 2825 observations of 1189 anonymous objects. This is still far insufficient for coverage of galaxies in RC2 and those anticipated in future RC3. The need for large systematic programs of photoelectric aperture photometry of galaxies in the U,B,V system remains as pressing as ever. Observatories should consider dedicating small telescopes to this urgent task. In this respect the present catalogue should be helpful to identify unobserved or insufficiently observed objects. Total magnitudes and colors, and other photometric parameters derived from the present catalogue of raw data will be included in the RC3. Notes: * RC1, RC2 and RC3 are archived in VII/16/, VII/112/ and VII/155 respectively. * The column "X" of the published catalogue is not included in the archived catalogue. * Table 1, List of references and codes, that in alphabetical order, and a table of Notes, in the published catalogue, are not archived here. * A supplement of "Corrections to the UBV catalogue" was circulated as a photocopy print, dated on July 1985. The archived catalogue is not made this corrections.

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