Flat Issues: Tried to analyze the flat frames using PRiSMv10. The CCD Atik383L+ have typical value of full electron well equal to 26,000. Set the diffuser to telescope (3 layered white cloth) and exposed for 1×1 bin and 2×2 bin for different time intervals to get ADU counts near to half of full well capacity. PRiSMv10 analyzed the ADU by plotting each pixel counts under menu: Analysis/Histogram/Global.
