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J/A+AS/123/115      Variables stars in Palomar-Groningen field 3 (Ng+ 1997)
Field 3 of the Palomar-Groningen Survey.
I. Variable stars at the edge of the Sagittarius dwarf galaxy
       Ng Y.K., Schultheis M.
      <Astron. Astrophys. Suppl. Ser. 123, 115 (1997)>
      =1997A&AS..123..115N      (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Magnitudes, photographic

Keywords: stars: carbon ; AGB, post-AGB; variables: others - Local Group -
          galaxies: Sagittarius dwarf

Abstract:
    A catalogue is presented with variable (RR Lyrae, semiregular and
    Mira) stars located inside field #3 (PG3) of the Palomar-Groningen
    Survey at the outer edge of the Sagittarius dwarf galaxy. One of the
    semiregular variables is a carbon star, comparable with those found by
    Azzopardi et al. (1991A&AS...88..265A). Serendipity provides the
    suggestion, that their carbon stars might not be located inside, but
    behind the bulge on the Sagittarius dwarf galaxy.
Objects:
    --------------------------------------------------
       RA   (2000)   DE      Designation(s)
    --------------------------------------------------
    19 29 58.9   -17 40 40   Sagittarius dwarf galaxy
    --------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1            77       22   Catalogue of PG3 variable stars
find_pg3.ps     1023    23098   Finding charts


See also:
   J/A+A/338/581 : Field 3 Palomar-Groningen survey. II. (Schultheis+ 1998)


Byte-by-byte Description of file: table1

   Bytes Format Units   Label     Explanations

   1-  4  I4    ---     ID        Star number (1)
   6- 13  A8    ---     VarType   Variable type (2)
  16- 17  I2    h       RAh       Right ascension (J2000)
  19- 20  I2    min     RAm       Right ascension (J2000)
  22- 25  F4.1  s       RAs       Right ascension (J2000)
      27  A1    ---     DE-       Declination sign
  28- 29  I2    deg     DEd       Declination (J2000)
  31- 32  I2    arcmin  DEm       Declination (J2000)
  34- 37  F4.1  arcsec  DEs       Declination (J2000)
  40- 44  F5.1  deg     GLON      Galactic longitude
  46- 50  F5.1  deg     GLAT      Galactic latitude
  53- 57  F5.2  mag     Bmag      Mean photographic B_J_ magnitude (3)
  59- 63  F5.2  mag     Rmag      Mean photographic R_F_ magnitude (3)
  66- 75  F10.6 d       P         ? Period
      77  I1    ---     Q         [0/3] Quality flag (4)

Note (1): Variable star number, following Plaut (1971A&AS....4...75P) and
           Wesselink (1987)
Note (2): Variable star classification, where the semiregular classification
          is taken from Plaut (1971A&AS....4...75P); if two classifications are
          given, the first is from Wesselink (1987) and the second from
          Plaut (1971A&AS....4...75P)
Note (3): The mean B_J and R_F photographic magnitudes for the RR Lyrae
           and the Mira are from Wesselink (1987). The photographic photometry
           of the semiregular variables is obtained in the study by Ng (1994)
Note (4): Quality flag (classification and period) of variable star
          following Wesselink (1987);
        Q=0: no doubt about the determined period and classification,
        Q=1: classification is correct but alternative period is possible,
        Q=2: period determination is correct but the classification is doubtful,
        Q=3: both period determination and classification are unreliable


Acknowledgements: Yuen Keong Ng 


References:
  Ng Y.K., 1994, Ph.D. thesis, Leiden University, the Netherlands
  Plaut L., 1971, A&AS 4, 75
  Wesselink Th.J.H., 1987, Ph.D. thesis, Catholic University Nijmegen,
     the Netherlands
(End)                                         Patricia Bauer [CDS]   13-Jan-1997