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We present the 158 standard stars that define the u'g'r'i'z' photometricsystem. These stars form the basis for the photometric calibration of the SloanDigital Sky Survey (SDSS). The defining instrument system and filters, theobserving process, the reduction techniques, and the software used to createthe stellar network are all described. We briefly discuss the history of thestar selection process, the derivation of a set of transformation equations forthe UBVRcIc system, and plans for future work.

the astronomical journal

The [CLC][ITAL]u[/ITAL][/CLC][arcmin]′[CLC][ITAL]g[/ITAL][/CLC][arcmin]′[CLC][ITAL]r[/ITAL][/CLC][arcmin]′[CLC][ITAL]i[/ITAL][/CLC][arcmin]′[CLC][ITAL]z[/ITAL][/CLC][arcmin]′ Standard-Star System