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J/A+AS/139/559      Abell 496 photometric catalogue          (Slezak+, 1999)
A photometric catalogue of galaxies in the cluster Abell 496.
       Slezak E., Durret F., Guibert J., Lobo C.
      <Astron. Astrophys. Suppl. Ser. 139, 559 (1999)>
      =1999A&AS..139..559S
ADC_Keywords: Clusters, galaxy ; Magnitudes

Keywords: galaxies: clusters: individual: Abell 496 - galaxies: clusters of


Description:
    Two catalogues of galaxies in the direction of the cluster Abell 496
    are presented. The first one includes 3,879 galaxies located in a
    region roughly ±1.3 degree from the cluster centre ; it has been
    obtained by scanning part of a Schmidt photographic plate taken in the
    Bj band. Positions are very accurate but magnitudes are not. A second
    catalogue gives a list of galaxies with CCD magnitudes in the V (239
    galaxies) and R (610 galaxies) bands for a much smaller region in the
    centre of the cluster.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        84     3879   Galaxy candidates from the SRC-J 621 plate
table2.dat        76      610   Galaxy candidates from CCD imaging


See also:
  J/A+AS/139/525 : Abell 496 heliocentric velocities (Durret+ 1999)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  4  I4    --      Seq1      Running number
       6  I1    h       RAh       Right ascension (J2000.0)
   8-  9  I2    min     RAm       Right ascension (J2000.0)
  11- 16  F6.3  s       RAs       Right ascension (J2000.0)
      18  A1    ---     DE-       Declination sign (J2000.0)
  19- 20  I2    deg     DEd       Declination (J2000.0)
  22- 23  I2    arcmin  DEm       Declination (J2000.0)
  25- 29  F5.2  arcsec  DEs       Declination (J2000.0)
  31- 35  F5.1  arcsec  amaj      Half major axis
  38- 40  F3.1  --      e         Eccentricity
  42- 44  I3    deg     PA        Position angle of the major axis
  46- 49  F4.1  mag     bjmag     bj magnitude
  52- 58  F7.1  arcsec  Xpos      X position relative to the X-ray centre (1)
  60- 66  F7.1  arcsec  Ypos      Y position relative to the X-ray centre (1)
  68- 73  F6.1  arcsec  Dist      Distance to the cluster centre
  75- 79  I5    --      MAMA      MAMA catalogue reference number
  82- 84  I3    ---     Seq2      ? Number in table2

Note (1): Coordinates of the X-ray centre:
           04:33:37.9-13:15:47 (J2000.0)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    --      Seq2      Running number
       5  I1    h       RAh       Right ascension (J2000.0)
   7-  8  I2    min     RAm       Right ascension (J2000.0)
  10- 14  F5.2  s       RAs       Right ascension (J2000.0)
      16  A1    ---     DE-       Declination sign (J2000.0)
  17- 18  I2    deg     DEd       Declination (J2000.0)
  20- 21  I2    arcmin  DEm       Declination (J2000.0)
  23- 27  F5.2  arcsec  DEs       Declination (J2000.0)
  29- 32  F4.2  --      e         Eccentricity
  34- 36  I3    deg     PA        Position angle of the major axis
                                   (from North to East)
  38- 42  F5.2  mag     Vmag      ? V magnitude
  44- 48  F5.2  mag     Rmag      R magnitude
  50- 56  F7.1  arcsec  Xpos      X position relative to the X-ray centre (1)
  58- 64  F7.1  arcsec  Ypos      Y position relative to the X-ray centre (1)
  66- 71  F6.1  arcsec  Dist      Distance to the cluster centre
  73- 76  I4    --      Seq1      ? Number in Table 1

Note (1): Coordinates of the X-ray centre:
          04:33:37.9-13:15:47 (J2000.0)


Acknowledgements: Florence Durret 


History:
  * 12-Nov-1999: preparation of the tables
  * 17-Oct-2000: Seq1=1828 (table1) and Seq2=466 (table2), which were
    cross-identified inadvertently (mail exchange with Eric Slezak)
(End)                                          Patricia Bauer [CDS]  12-Nov-1999