CDROM/APJ/V473/P822 A Minnesota APS Catalog of Galaxies (Hoffman+ 1996)
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A Minnesota Automated Plate Scanner Catalog of Galaxies behind the Virgo 
Cluster and toward its Antipode
G. Lyle Hoffman, John M. Dickey, Nanyao Y. Lu & Rene Fromhold-Treu
<1996, ApJ, 473, 822>
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Abstract:
     We present a catalog of 1268 galaxies, essentially complete to B <= 17.0,
  found by scanning glass copies of several fields of the original Palomar 
  Sky Survey using the Minnesota Automated Plate Scanner in its 
  isodensitometric mode (as opposed to the threshold densitometric mode used 
  in the APS Catalog of the POSS I).  In addition to the different scanning 
  mode, we have employed a different star-galaxy separation method and have 
  visually inspected POSS prints to verify that each image remaining in the 
  catalog is non-stellar.  The scanned fields are distributed generally in 
  two areas, one around the outskirts of the Virgo Cluster, the other toward 
  the antipode of the cluster (but still in the northern celestial 
  hemisphere).  The catalog gives the position of the center of each galaxy; 
  estimates of the blue and red magnitudes within the outermost threshold 
  crossing and of the blue magnitude extrapolated to zero surface brightness; 
  blue and red diameters of four ellipses fit to the four threshold crossings 
  (approximately 23.8, 23.6, 23.2, and 22.7 mag per square arcsec in blue, and
  22.5, 22.4, 21.5 and 21.2 mag per square arcsec in red), and the 
  ellipticities of those four ellipses.  The catalog has served as a base from 
  which to draw targets for a Tully-Fisher study of the Virgocentric infall 
  velocity of the Local Group.

Keywords:  Galaxies: Spiral --- Galaxies: Irregular --- Galaxies:  Photometry 
  --- Galaxies: Clustering

Description:
  Table 3 lists the galaxies found by the scanner in each of the 17 fields.
  The table is organized by CGCG field, with a local running reference
  number ordered by increasing right ascension within that field.  B24 is
  our estimate of the faintest B magnitude consistent with the four 
  threshold crossings for each galaxy, and Btot is our attempt to 
  estimate the total B magnitude extrapolated to zero surface brightness.
  The diameters of circles with areas equal to the ellipses fit to the
  four threshold crossings are given, along with the ellipticities of
  those ellipses.  For broken images ("clumps"), only the ellipticity
  of the outermost ellipse is given.  On the second line for each galaxy,
  we give corresponding measurements of R24, diameters and ellipticities from 
  the E plate.

File Summary:
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File Name     Lrecl      Records       Explanations
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table3.dat     77                      Galaxies found by MAPS
table3.tex                             AASTeX version of Table 3
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Byte-by-byte Description of file:  table3.dat
First line for each galaxy:
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Bytes    Format     Units       Label          Explanations
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1-3      I3         ---         Ref. No.       Running index for each field
5-13     A9         ---         Ident.         Name from another catalog
14-17    F4.0       h           RAh            Right ascension (1950) (hours)
18-19    I2         min         RAm            Right ascension (1950) (minutes)
20-22    I3         0.1s        RAs            Right ascension (1950) (seconds)
23-26    F4.0       deg         DEd            Declination (1950) (degrees)
27-28    I2         arcmin      DEm            Declination (1950) (arcminutes)
29-31    I3         0.1arcsec   DEs            Declination (1950) (arcseconds)
32-36    F5.1       mag         B24            B magnitude to lowest threshold
37-41    F5.1       mag         Btot           B magnitude extrapolated
42-45    I4         arcsec      d1             B diameter to lowest threshold
46-49    I4         arcsec      d2             B diameter to second threshold
50-53    I4         arcsec      d3             B diameter to third threshold
54-57    I4         arcsec      d4             B diameter to highest threshold
58-62    F5.2       ---         e1             Ellipticity, lowest B threshold
63-67    F5.2       ---         e2             Ellipticity, second B threshold
68-72    F5.2       ---         e3             Ellipticity, third B threshold
73-77    F5.2       ---         e4             Ellipticity, highest B threshold
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Second line for each galaxy:
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Bytes    Format     Units       Label          Explanations
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1-31     ---        ---         ---            Blank
32-36    F5.1       mag         R24            R magnitude to lowest threshold
37-41    ---        ---         ---            Blank
42-45    I4         arcsec      d1             R diameter to lowest threshold
46-49    I4         arcsec      d2             R iameter to second threshold
50-53    I4         arcsec      d3             R diameter to third threshold
54-57    I4         arcsec      d4             R diameter to highest threshold
58-62    F5.2       ---         e1             Ellipticity, lowest R threshold
63-67    F5.2       ---         e2             Ellipticity, second R threshold
68-72    F5.2       ---         e3             Ellipticity, third R threshold
73-77    F5.2       ---         e4             Ellipticity, highest Rthreshold
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Notes for file:  table3.dat
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  The set of entries for each CGCG field is preceded by a line which has
  "Field" in bytes 1-5 followed by the number of the field as given in
  CGCG (format I3) in bytes 7-9.

  Throughout, B refers to quantities measured on the POSS O plate, R to
  quantities measured on the POSS E plate.
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(End)                Lyle Hoffman [Lafayette College] 15-Mar-96, rev. 22-May-97