Table 2: Mean zero points and their uncertainties.
Chip Zero point Uncertainty
  (mag) (mag)
ccd50 24.238 0.040
ccd51 24.334 0.048
ccd52 24.113 0.040
ccd53 24.312 0.035
ccd54 24.311 0.029
ccd55 24.363 0.028
ccd56 24.293 0.034
ccd57 24.171 0.029

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