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J/A+AS/110/1        CCD photometry of Pal 1        (Borissova+ 1995)
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The CCD photometry of the globular cluster Palomar 1.
       Borissova J., Spassova N.
      <Astron. Astrophys. Suppl. Ser. 110, 1 (1995)>
      =1995A&AS..110....1B      (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, globular ; Photometry, CCD
Keywords: clusters: globular: Pal 1 - HR diagram

Abstract:
    A CCD photometry of the halo cluster Palomar 1 is presented in the
    Thuan-Gunn photometric system. The principal sequences of the
    color-magnitude diagrams are delineated in different spectral bands.
    The color- magnitude diagrams of the cluster show a well defined red
    horizontal branch, a subgiant branch and a main-sequence down to about
    two magnitudes below the main sequence turnoff. The giant branch is
    absent and the brightest stars are the horizontal branch stars. The
    age of the cluster determined by comparison with the isochrones of
    Bell & VandenBerg (1987ApJS...63..335B) is consistent with an age in
    the interval 12-14Gyr. A distance modulus of (m-M)_g0_=15.38+/-0.15
    magnitude and E(g-r)=0.16 has been derived. An estimate of the cluster
    structural parameters such as core radius and concentration parameter
    gives r_c_=1.5pc and c=1.46. A mass estimate of 1.1x10^3^M_{sun}_ and
    a mass-to-light ratio of 1.79 have been obtained using King's
    (1966AJ.....71...64K) method. The morphology of color-magnitude
    diagrams allows Pal 1 to be interpreted as probably a globular cluster
    rather than an old open one. For a description of the uvgr photometric
    system, see e.g.
    <GCPD/38>

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE    Designation(s)
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    03 33 23.0 +79 34 50   Pal 1 = C 0325+794
    ----------------------------------------------------------

File Summary:
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  FileName        Lrecl  Records   Explanations
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ReadMe             80        .   This file
table10.dat        44      521   CCD photometry of Pal 1
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Byte-by-byte Description of file: table10.dat
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   Bytes Format Units   Label     Explanations
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   1-  3  I3    ---     ID        Identification number (Palomar 1 BS NNN)
   5- 10  F6.2  pix     Xpos      X position (1)
  12- 17  F6.2  pix     Ypos      Y position (1)
  19- 23  F5.2  mag     gmag      ? g magnitude
  26- 30  F5.2  mag     rmag      ? r magnitude
  32- 36  F5.2  mag     imag      ? i magnitude
  39- 43  F5.2  mag     zmag      ? z magnitude
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Note (1): 1pix=0.8arcsec. X increasing from North to South, Y from East to West.
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History: Prepared via OCR at CDS.
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(End)                          James Marcout,  Patricia Bauer [CDS]  12-Jun-1997