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J/MNRAS/122/363     Eggen PV photometry in NGC 7492             (Cuffey, 1961)
NGC 7492
    Cuffey J.
   <Mon. Not. R. Astron. Soc. 122, 363 (1961)>
   =1961MNRAS.122..363C
ADC_Keywords: Clusters, globular ; Photometry, Eggen


Abstract:
    Photometry of NGC 7492, a very faint, well resolved cluster, shows
    that it has a colour-magnitude relation similar in form to that of a
    typical globular cluster. A well defined but sparsely populated red
    giant branch is present, along with a horizontal branch, blue stars,
    and variables. The distance modulus, 17.17, and the distance 27.2kpc.,
    are obtained. The colour excess appears to be negligible. The
    integrated photographic absolute magnitude is -4.84. The star density
    in the cluster is unusually low, being approximately 0.06 stars per
    cubic parsec for stars brighter than +2.5 absolute magnitude.

    For a description of the PV photometric system, see e.g. GCPD/31
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    23 08 26.7   -15 36 41   NGC 7492
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        24       35   NGC 7492, standard stars
table4.dat        27      159   NGC 7492, catalogue of stars


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     Star      Star designation (Cl* NGC 7492 C A in Simbad)
   3-  7  F5.2  mag     Pmag      ? P magnitude (See GCPD/31)
       8  A1    ---     u_Pmag    Uncertainty flag on Pmag
  10- 14  F5.2  mag     Vmag      ? V magnitude (See GCPD/31)
      15  A1    ---     u_Vmag    Uncertainty flag on Vmag
  17- 21  F5.2  mag     P-V       ? P-V colour index (See GCPD/31)
      22  A1    ---     u_P-V     Uncertainty flag on P-V
      24  A1    ---     Note      [VD] D: double star, V: variable


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

   1-  4  A4    ---     Region    Region in finding chart, SnRn (1)
   6-  7  I2    ---     Star      Star number in the region (2)
       8  A1    ---     m_Star    Multiplicity index on Star
  11- 15  F5.2  mag     Pmag      P magnitude (See GCPD/31)
  17- 21  F5.2  mag     Vmag      V magnitude (See GCPD/31)
  23- 27  F5.2  mag     P-V       P-V colour index (See GCPD/31)

Note (1): S for Sector, R for Ring

Note (2): In Simbad, Cl* NGC 7492 C N-N-NN (S1R1  1 = Cl* NGC 7492 C 1-1-1)



History: Prepared via OCR at CDS.

(End)                       Marie-Jose Wagner, Patricia Bauer [CDS]  23-Mar-1999