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J/A+AS/121/499      BV and rg photometry of Pal 13 (Borissova+ 1997)
CCD photometry of the globular cluster Palomar 13
    Borissova J., Markov H., Spassova N.
   <Astron. Astrophys. Suppl. Ser. 121, 499 (1997)>
   =1997A&AS..121..499B      (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, CCD ; Clusters, globular

Keywords: globular clusters: individual: Palomar 13 - Hertzprung-Russel diagram


Abstract:
    A new CCD photometry of the halo cluster Palomar 13 is used to
    construct a color-magnitude diagram in the Thuan-Gunn and the B, V
    photometric systems. The color-magnitude diagram of the cluster shows
    as already noted by Ortolani et al. (1985AJ.....90..473O) an extremely
    poor red horizontal branch and a very sparsely populated giant branch.
    Seven BSS candidates are identified in the field of Palomar 13. The
    age of the cluster determined by fitting with the isochrones of
    Proffitt & Vanden Berg (1991ApJS...77..473P) and Bergbusch & Vanden
    Berg (1992ApJS...81..163B) and by a differential comparison of the
    color-magnitude diagram with that of Pal 5 is 12±2Gyr.
Objects:
    -------------------------------------------
       RA  (2000)  DE    Designation(s)
    -------------------------------------------
     23 06.5    +12 44   Pal 13 = C 2304+124
    -------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table6            35       80   B,V photometry of Pal 13
table7            36      175   g,r photometry of Pal 13


Byte-by-byte Description of file: table6

   Bytes Format Units   Label     Explanations

   1-  2  I2    ---     ID        Identification number
   7- 11  F5.1  pix     Xpos      X position (1 pix = 0.30 arcsec)
  15- 19  F5.1  pix     Ypos      Y position (1 pix = 0.34 arcsec)
  24- 28  F5.2  mag     Vmag      V magnitude
  32- 35  F4.2  mag     B-V       B-V color index


Byte-by-byte Description of file: table7

   Bytes Format Units   Label     Explanations

   2-  4  I3    ---     ID        Identification number
   8- 13  F6.2  pix     Xpos      X position (1 pix = 0.30 arcsec)
  16- 21  F6.2  pix     Ypos      Y position (1 pix = 0.34 arcsec)
  25- 29  F5.2  mag     gmag      g magnitude
  32- 36  F5.2  mag     g-r       g-r color index


Acknowledgements: J. Borissova 

(End)                                         Patricia Bauer [CDS]   28-Jun-1996