Description
The catalog is an extension of the BSC4 (Hoffleit 1982; see catalog <V/50>) and contains compiled data on stars for which photoelectric determinations are given as 7.10V or brighter and that are not already included in the latter catalog. The data included in the supplement are basically the same as those in the BSC4 itself, and the format of the machine version is very similar. Notable differences are that the NAME column has been omitted, since very few supplement stars have Bayer or Flamsteed designations, and has been replaced with the SAO number. Also, the parallax field includes only data determined from trigonometric methods; all dynamical parallax data have been relegated to the REMARKS. Position-angle data are given in the main table for double stars, whereas they were contained, if reported, only in the REMARKS file of the BSC4. Remarks for supplement stars are given in a separate file of the machine version and are present for 49% of the stars. The introductory file "intro.doc" contains the text given in the introduction to the published catalog except that the figures are, of course, not included. Data included in the catalog "bsc4s.dat" are HD number; DM number; SAO number; double-star code or identification; variable-star identification; right ascension (B1900) declination, right ascension (B2000) declination; galactic coordinates; V magnitude; B-V, U-B, R-I colors; spectral type; annual proper motions; parallax; radial velocity (km/s): and projected rotational velocity v sin i (km/s). Data included for multiple stars are magnitude difference, separation (arcsec), position angle (PA) of components, component identifications (A, B, ...), and number of components (N). A remarks flag is included as a pointer to a remarks file. The third file "remarks.dat" contains the actual remarks for stars flagged in the data file.
|