Astronomical Data Center

ADCADC/CDS Standard Document for Catalog:
/catalogs/3/3009A/

The following is the "ReadMe" document that describes this ADC catalog. You can access the files described here in three ways:

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III/9A        F2-G5 Stars in a North Galactic Pole Region       (Upgren 1963)
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F2-G5 Stars in a North Galactic Pole Region
  Upgren Jr. A.R.
  <Astron. J, 68, 194 (1963)>
  =1963AJ.....68..194U
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ADC_Keywords: Galactic pole, north; Regional catalog

Description:
  The catalog is an objective-prism survey for stars of spectral
  classes F2 to G5 in a region of high galactic latitude.  The catalog
  contains 1127 stars and is complete to a limiting photographic
  magnitude of 12.5.  The photographic plates used permit a separation
  of the stars into narrow and well-defined spectral classes.  The
  spectral classification of the stars in the catalog is based on the
  Yerkes MK system.  The catalog is subdivided into one-degree
  declination zones as are the DM catalogs.  The degree zones are
  based on 1855 coordinates.  The catalog includes sequence numbers of
  the stars, BD and HD numbers, positions (B1950), B magnitudes,
  spectral types, and remarks. 

File Summary:
--------------------------------------------------------------------------------
 FileName    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
ReadMe          80          .    This file
catalog.dat     47       1127    catalog data
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Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
   Bytes  Format  Units  Label     Explanations
--------------------------------------------------------------------------------
   1-  7   A7     ---    UI        UI number                           
   9- 16   A8     ---    BD        BD number                           
  18- 23   A6     ---    HD        HD number                           
  25- 26   I2     h      RAh       Right ascension, equinox 1950, hours
  28- 31   F4.1   min    RAm       RA minutes 
      33   A1     ---    DE-       sign of DEC
  34- 35   I2     deg    DEd       Declination, equinox 1950.0, degrees 
  37- 38   I2     arcmin DEm       Dec arcminutes.  
  40- 43   F4.1   ---    B        *? B magnitude.     
  45- 46   A2     ---    Sp        Spectral type 
      47   A1     ---    u_Sp      uncertainty in Sp
----------------------------------------------------------------------- 

Note on B:
  There is a <Null> value in column 'B' on line 1054 of which UI number
  is 41 101. This star is observed on two deep plates, 4765 and 5471, taken
  over one year apart, to be of spectral classes F2 and A5, respectively, and
  magnitudes 12.6 and 12.1, respectively, and is not included in the list by
  Slettebak and Stock (1959). The A5 spectral image appears similar to one of 
  RR Lyrae of the same dispersion (Nassau and Stephenson 1960). It is likely 
  that this star is a previously undiscovered RR Lyrae type variable.

Remarks:                                                                        
  Data format modified at the Astronomical Data Center (ADC)/NASA GSFC,   
  1988 June...WHW                                                         

References:
  Nassau, J. J., and Stephenson, C. B. 1960, ibid. 132, 130
  Slettebak, A., and Stock, J. 1959, Hamburger Sternwarte V, No. 5 
  Upgren, A.R. 1963, Astron. J. 68, 194                                   
  Upgren, A.R. 1984, Contr. Van Vleck Obs. No. 2, p. 19 (finding charts).
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(End)                       C.-H. Joseph Lyu [Hughes STX/NASA]     10-June-1995

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