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GSC: The Guide Star Catalogue

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Table name: 	gsc; gsc0001 to gsc9537
Records:    	25126027
Spectral Band: 	OPT,PHOTO
Kind of Object: LOG
Mode: 		Survey
PreView:
Coordinates: 	J2000

Reference:

• B. M. Lasker et al., GSC: Astronomical Foundations and image processing
• J. L. Russel et al., GSC: Photometric and astrometric models and solutions
• H. Jenkner et al., GSC: Production, database organization, and population statistics

Fields:

     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.