This paper describes the Sloan Digital Sky Survey photometric system, a new five-color (u‧ g‧ r‧ i‧ z‧) wide-band CCD system with wavelength coverage from 3000 to 11 000 Å. The zero points will be based on an updated version of the spectrophotometric ABv system. This updated calibration, designated as AB₉₅, is presented in this paper.
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Fukugita et al. (1996) studied this question.