J/A+A/406/593       Galaxies in Southern Bright Star Fields I.   (Baker+, 2003)
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Galaxies in Southern Bright Star Fields I. Near-infrared imaging
    Baker A.J., Davies R.I., Lehnert M.D., Thatte N.A., Vacca W.D.,
    Hainaut O.R., Jarvis, M.J., Miley G.K., Roettgering H.J.A.
   <Astron. Astrophys. 406, 593 (2003)>
   =2003A&A...406..593B
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ADC_Keywords: Galaxies, photometry ; Infrared sources ; Photometry, infrared
Keywords: instrumentation: adaptive optics - galaxies: photometry -
          infrared: galaxies - infrared: stars

Abstract:
    As a prerequisite for cosmological studies using adaptive optics
    techniques, we have begun to identify and characterize faint sources
    in the vicinity of bright stars at high Galactic latitudes. The
    initial phase of this work has been a program of K_s_ imaging
    conducted with SOFI at the ESO NTT. From observations of 42 southern
    fields evenly divided between the spring and autumn skies, we have
    identified 391 additional stars and 1589 galaxies lying at separations
    <60" from candidate guide stars in the magnitude range 9.0<R<12.4.
    When analyzed as a "discrete deep field" with 131-arcmin^2^ area, our
    dataset gives galaxy number counts that agree with those derived
    previously over the range 16<K_s_<20.5. This consistency indicates
    that in the aggregate, our fields should be suitable for future
    statistical studies. We provide our source catalogue as a resource for
    users of large telescopes in the southern hemisphere.

Description:
    K_s_ parameters of 1980 sources lying within an arcminute of one of 42
    bright stars. To facilitate future extragalactic studies with adaptive
    optics, the stars were selected to have blue colors, high galactic
    latitudes, and intermediate southern declinations. For each fainter
    source, Table 3 lists a unique designation (indicating the bright star
    field, and the position of the source relative to the star within the
    field), the estimated J2000.0 coordinates, the angular separation from
    the bright star, the integrated K_s_ magnitude, the major and minor
    axes, the position angle of the major axis, and the stellarity index.

File Summary:
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 FileName   Lrecl    Records    Explanations
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ReadMe         80          .   This file
table1.dat     84         42   Parameters of 42 bright southern stars
table3.dat     71       1980   K_s_ parameters of 1980 sources lying within
                                an arcminute of one of 42 bright stars
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Byte-by-byte Description of file: table1.dat
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  Bytes Format Units   Label      Explanations
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  1-  4  A4    ---     ---        [SBSF]
  6-  7  I2    ---     Field      Field identifier used in Table 3 designations
  9- 20  A12   ---     USNO-B1.0  USNO-B1.0 designation for star (1)
 22- 23  I2    h       RAh        Right ascension (J2000.0) (1)
 25- 26  I2    min     RAm        Right ascension (J2000.0) (1)
 28- 32  F5.2  s       RAs        Right ascension (J2000.0) (1)
     34  A1    ---     DE-        Declination sign (J2000.0) (1)
 35- 36  I2    deg     DEd        Declination (J2000.0) (1)
 38- 39  I2    arcmin  DEm        Declination (J2000.0) (1)
 41- 44  F4.1  arcsec  DEs        Declination (J2000.0) (1)
 46- 49  I4    mas/yr  pmRA       Star proper motion in R.A. (J2000.0) (1)
 51- 54  I4    mas/yr  pmDE       Star proper motion in Dec. (J2000.0) (1)
 56- 59  F4.1  mag     Bmag       Star B magnitude (1)
 61- 64  F4.1  mag     Rmag       Star R magnitude (1)
 66- 70  F5.2  mag     Kmag       Star K_s_ magnitude
 72- 76  A5    ---     Dates      Dates of SOFI imaging (2)
 78- 79  I2    min     Time       Total SOFI integration time
 81- 84  A4    ---     Note       Falls in an EIS Patch or near an NVSS source?
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Note (1): Value taken from Monet et al. (2003AJ....125..984M) 
    as tabulated in VizieR Online Data Catalog <I/284>.
Note (2): Log of observations:
    ---------------------------------
    Night      Date      Conditions
    ---------------------------------
      1    2001/Feb/15   photometric
      2    2001/Feb/17   photometric
      3    2001/Mar/07   thin cirrus
      4    2001/Oct/06   thin cirrus
      5    2001/Oct/07   photometric
      6    2001/Oct/08   photometric
    ---------------------------------
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Byte-by-byte Description of file: table3.dat
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   Bytes Format Units   Label    Explanations
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   1-  4  A4    ---     ---      [SBSF]
   6- 15  A10   ---     SBSF     Source name (1)
  17- 18  I2    h       RAh      Right ascension (J2000.0)
  20- 21  I2    min     RAm      Right ascension (J2000.0)
  23- 27  F5.2  s       RAs      Right ascension (J2000.0)
      29  A1    ---     DE-      Declination sign (J2000.0)
  30- 31  I2    deg     DEd      Declination (J2000.0)
  33- 34  I2    arcmin  DEm      Declination (J2000.0)
  36- 39  F4.1  arcsec  DEs      Declination (J2000.0)
  41- 44  F4.1  arcsec  Offset   Source separation from bright star
  46- 50  F5.2  mag     Ksmag    Source K_s_ magnitude
  52- 56  F5.2  arcsec  MajAxis  Source major axis
  58- 62  F5.2  arcsec  MinAxis  Source minor axis
  64- 66  I3    deg     PA       Source major axis position angle (E of N)
  68- 71  F4.2  ---     SSI      Source stellarity index (1=star, 0=galaxy)
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Note (1): Within the source name,
   - bytes  6- 7 give the bright star field, as listed in table1
   - bytes  8-11 give the right ascension offset from the star, in units of 0.1"
   - bytes 12-15 give the declination offset from the star, in units of 0.1"
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Acknowledgements: Andrew Baker <ajb@mpe.mpg.de>
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(End)                        Andrew Baker [MPE Garching, Germany]    26-May-2003