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J/MNRAS/306/592    UBVR CCD sequences for wide-field surveys. II. (Croom+, 1999)
Faint UBVRI CCD sequences for wide-field surveys.
II. UBVR sequences at δ=-30°
       Croom S.M., Ratcliffe A., Parker Q.A., Shanks T., Boyle B.J., Smith R.J.
      <Mon. Not. R. Astron. Soc. 306, 592 (1999)>
      =1999MNRAS.306..592C      (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, UBVRI ; Surveys

Keywords: techniques: photometric - catalogues


Abstract:
    We present results from a continuing campaign to secure deep
    multi-colour CCD sequences for photoelectric calibration in UK Schmidt
    fields with galactic latitudes |b|>50°. In this paper, we present
    UBVR photometry in 12 fields and BR photometry in a further 14 fields
    observed within UK Schmidt survey fields centered at δ=-30°.
    Our observations were carried out with the 0.9m Telecope at the
    Cerro-Tololo Inter-American Observatory.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tables.dat       107     1323   UBVR photometry


See also:
   J/MNRAS/276/33 : UBVRI CCD sequences for wide-field surveys. I. (Boyle+ 1995)


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

   Bytes Format Units   Label    Explanations

   1-  9  A9    ---     Object   Object designation (fNNNN-NNN)
  11- 12  I2    h       RAh      Right ascension (J2000.0)
  14- 15  I2    min     RAm      Right ascension (J2000.0)
  17- 21  F5.2  s       RAs      Right ascension (J2000.0)
      23  A1    ---     DE-      Declination sign (J2000.0)
  24- 25  I2    deg     DEd      Declination (J2000.0)
  27- 28  I2    arcmin  DEm      Declination (J2000.0)
  30- 33  F4.1  arcsec  DEs      Declination (J2000.0)
  35- 39  F5.2  mag     Bmag     B magnitude
  41- 44  F4.2  mag     e_Bmag   rms uncertainty on Bmag
  46- 50  F5.2  mag     B25mag   B 25 pixel aperture magnitude  (1)
  52- 56  F5.2  ---     s/g      Star galaxy separation parameter b_10_-b_6_ (2)
  58- 62  F5.2  mag     Umag     U magnitude
  64- 67  F4.2  mag     e_Umag   rms uncertainty on Umag
  69- 73  F5.2  mag     U25mag   U 25 pixel aperture magnitude (1)
  75- 79  F5.2  mag     Vmag     V magnitude
  81- 84  F4.2  mag     e_Vmag   rms uncertainty on Vmag
  86- 90  F5.2  mag     V25mag   V 25 pixel aperture magnitude (1)
  92- 96  F5.2  mag     Rmag     R magnitude
  98-101  F4.2  mag     e_Rmag   rms uncertainty on Rmag
 103-107  F5.2  mag     R25mag   R 25 pixel aperture magnitude (1)

Note (1): 25 pixel aperture magnitudes give good estimates of total galaxy
           magnitude for galaxies with isophotal diameter less than 20".
Note (2): Generally, objects with b10-b6 < -0.2 will be galaxies,
           although this does vary somewhat from field to field, depending
           on the seeing in each observation.


History: Copied on 22-Apr-1999 at
             http://icstar5.ph.ic.ac.uk:80/~scroom/phot/photom.html
(End)                                        Patricia Bauer  [CDS]   21-Apr-1999