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Fig. 3
Photometric calibration of the 01F camera. The uncalibrated magnitude is simply − 2.5 log10Is, where Is is the background-subtracted sum of pixel intensities of all star pixels (LSP in the figure). The sensor response was linear (Gamma = 1.0). The magnitudes of stars used for calibration ranged from + 2.3M to 9.9M.
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