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J/AJ/122/1383           DIRECT BVI photometry in M31          (Mochejska+, 2001)
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The DIRECT project: catalogs of stellar objects in nearby galaxies.
 II. Eastern arm and NGC 206 in M31.
    Mochejska B.J., Kaluzny J., Stanek K.Z., Sasselov D.D.
   <Astron. J. 122, 1383 (2001)>
   =2001AJ....122.1383M
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ADC_Keywords: Galaxies, nearby ; Photometry
Mission_Name:
Keywords: galaxies: individual (M31) - galaxies: stellar content

Abstract:
    DIRECT is a project to directly obtain the distances to two important
    galaxies in the cosmological distance ladder, M31 and M33, using
    detached eclipsing binaries and Cepheids. As part of our search for
    these variables, we have obtained photometry and positions for
    thousands of stellar objects within the monitored fields, covering an
    area of 557.8arcmin^2^. Here we present the equatorial coordinates
    and BVI photometry for 26,712 stars in the M31 galaxy, along the
    eastern arm and in the vicinity of the star-forming region NGC 206.

File Summary:
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 FileName   Lrecl  Records   Explanations
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ReadMe         80        .   This file
table1a.dat    88     4276   Stellar objects in field M31A
table1b.dat    88     3738   Stellar objects in field M31B
table1c.dat    88    11809   Stellar objects in field M31C
table1d.dat    88     2549   Stellar objects in field M31D
table1e.dat    88     4330   Stellar objects in field M31F
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See also:
   J/AJ/115/1016 : M31B eclipsing binaries and Cepheids (Kaluzny+ 1998)
   J/AJ/115/1894 : M31A eclipsing binaries and Cepheids (Stanek+ 1998)
   J/AJ/117/2810 : M31C eclipsing binaries and Cepheids (Stanek+, 1999)
   J/AJ/118/346  : M31D eclipsing binaries and Cepheids (Kaluzny+ 1999)
   J/AJ/118/2211 : M31F eclipsing binaries and Cepheids (Mochejska+ 1999)

Byte-by-byte Description of file: table1a.dat, table1b.dat, table1c.dat
Byte-by-byte Description of file: table1d.dat, table1e.dat
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   Bytes Format Units   Label     Explanations
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   1- 21  A21   ---     D31       Star name (D31JHHMMSS.s+DDMMSS.s)
  23- 24  I2    h       RAh       Right ascension (J2000)
  26- 27  I2    min     RAm       Right ascension (J2000)
  29- 33  F5.2  s       RAs       Right ascension (J2000)
      35  A1    ---     DE-       Declination sign (J2000)
  36- 37  I2    deg     DEd       Declination (J2000)
  39- 40  I2    arcmin  DEm       Declination (J2000)
  42- 46  F5.2  arcsec  DEs       Declination (J2000)
  48- 52  F5.2  mag     Vmag      Johnson V band magnitude
  54- 58  F5.2  mag     Imag      ? Cousins I band magnitude
  60- 64  F5.2  mag     Bmag      ? Johnson B band magnitude
  66- 70  F5.2  mag   e_Vmag      Standard error in the Johnson V magnitude
  72- 76  F5.2  mag   e_Imag      ? Standard error in the Cousins I magnitude
  78- 82  F5.2  mag   e_Bmag      ? Standard error in the Johnson B magnitude
  84- 88  F5.2  ---     Js        ? Stetson variability index J_S_
                                     (Stetson, 1996PASP..108..851S)
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History:
    From electronic version of the journal
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(End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    14-Jan-2002