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J/A+AS/135/231      Mining in the Hipparcos raw data   (Falin+, 1999)
Mining in the Hipparcos raw data
       Falin J.L., Mignard F.
      <Astron. Astrophys. Suppl. Ser. 135, 231 (1999)>
      =1999A&AS..135..231F      (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ;
              Parallaxes, trigonometric
Keywords: stars: fundamental parameters - binaries: visual - astrometry


Description:
    We give 139 reprocessed problem double stars using Hipparcos data

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       124       13   Stars with no Hipparcos solutions
table2.dat       124       30   New component solutions (Stars flagged C)
table3.dat       124        8   Hipparcos solution with time dependent proper
                                motion (Stars flagged G)
table4.dat       124       34   Suspected doubles (Stars flagged S, HIP<60000)
table5.dat       124       56   Suspected doubles (Stars flagged S, HIP>60000)
table6.dat       124       60   Stochastic solutions (Stars flagged X, HIP<60000)
table7.dat       124       64   Stochastic solutions (Stars flagged X, HIP>60000)


See also:
   I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)


Byte-by-byte Description of file: table?.dat

   Bytes Format Units     Label   Explanations

   1-  6  I6    ---       HIP     Hipparcos identifier
   8- 19  F12.8 deg       RAdeg   Right ascension (ICRS, Epoch=1991.25)
  21- 32  F12.8 deg       DEdeg   Declination     (ICRS, Epoch=1991.25)
  34- 39  F6.2  mas       Plx     Parallax
  41- 47  F7.2  mas/yr    pmRA    Proper motion in RA (mualpha*cos(delta))
  49- 55  F7.2  mas/yr    pmDE    Proper motion in DE
  57- 60  F4.1  mas      e_RAdeg  Standard error in RA
  62- 65  F4.1  mas      e_DEdeg  Standard error in DE
  67- 70  F4.1  mas       e_Plx   Standard error in Parallax
  72- 75  F4.1  mas/yr    e_pmRA  Standard error in Proper motion in RA
                                  (e_mu*cos(DE))
  77- 80  F4.1  mas/yr    e_pmDE  Standard error in Proper motion in DE
  82- 84  I3    %         F1      Percentage of rejected Data
  86- 90  F5.2  ---       F2      Goodness-of-fit statistic (1)
  92- 94  A3    ---       Source  Origin of the information on the
                                   new double (2)
  96- 98  I3    deg       Theta   ? Position angle relative to primary
 100-105  F6.3  arcsec    Sep     ? Separation primary-secondary
 107-112  F6.3  arcsec    e_Sep   ? Standard error of separation
 114-118  F5.2  mag       Dmag    ? Difference of magnitude
 120-124  F5.2  mag       e_Dmag  ? Standard error of Dmag

Note (1): Values exceeding +3 indicate a bad fit to the data.

Note (2): HIC: Hipparcos Input Catalogue, Version 2 (Turon+ 1993), Cat. I/196
          SS1: Digitalized Sky Survey first epoch
          SS2: Digitalized Sky Survey second epoch
          TYC: Tycho Catalogue (ESA 1997), Cat. I/239
          LAM: Lampens & Oblak (1998, A&A, in prep.)


Acknowledgements: Jean-Louis Falin 

(End)           Jean-Louis Falin [OCA/CERGA], Patricia Bauer [CDS]   12-Jan-1999