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MAIN CHARACTERISTICS OF THE FBS OBSERVATIONAL MATERIAL

Sky coverage DEC>-15, all RA except the Milky Way (|b|>15)
Total area 17,000 sq.deg.
Number of fields1133 (each 16 sq.deg.)
Number of plates2050 (at least one plate with m=17 in each field)
Size of the plates4x4 deg, 16x16 cm
Photographic emulsion Eastman Kodak IIAF, IIaF, IIF, 103aF
Spectral range 3400-6900A, with a sensitivity gap at 5300A
Dispersion1800 A/mm near H-gamma, 2500 A/mm near H-beta
Spectral resolution 50 A/mm in average
Scale96.8 arcsec/mm
Limiting magnitude17.5-18.0 in V