Table name: gsc; gsc0001 to gsc9537 Records: 25126027 Spectral Band: OPT,PHOTO Kind of Object: LOG Mode: Survey PreView: Coordinates: J2000
Name Table Type Meaning ---- ----- ---- ------- star_id gsc A Name of the table in which the star was found gscxxxx I Star identification within the table in which the star was found. The concatenation of the table name and the star id in the table name form a unique Guide Star Catalogue Identifier. plate gscplates A Plate number. star/non-star gscxxxx B Flag: value is 0 for a star, 1 for any other object. mult/single gscxxxx B Flag: value is 1 if object is multiply defined in the catalogue, 0 otherwise. mag gscxxxx F The magnitude in the passband of the plate, displayed with a precision of 0.1 mag. e_mag gscxxxx F The error in the catalogued magnitude, displayed in 10th of mag. emulsion gscbandpass A Emulsion used for the plate. filter gscbandpass A Filter_used. ra gscxxxx D The right ascension, equinox J2000. The epoch is that of the plate from which the object was catalogued. (see plate_exp_date field). dec gscxxxx D The declination. same remark as above. e_pos gscxxxx F Position error: the quadratically combined error in the two coordinates.One notes that this is not the traditional definition and that, for un-correlated errors, the error in one coordinate is about 2.5 smaller. The units are arcsec. plate_exp_date gscplates D Date of plate exposure. (Use as epoch for the coordinates). plate_exp_time gscplates D Duration of the exposure. plate_quality gscplates A Plate_quality. _ra D Computed right ascension for equinox J1950. _de D Computed declination for equinox J1950. _lii F Computed galactic longitute. _bii F Computed galactic latitude. _L F Computed supergalactic longitude. _B F Computed supergalactic latitude.