Fill in the photometry keywords PHOTFLAM, PHOTZPT, PHOTPLAM, and PHOTBW with values calculated from the synthetic photometry throughput tables corresponding to the PHOTMODE keyword. The PHOTMODE keyword itself is constructed during CALWP2 processing from values of several other keywords which specify the camera, chip, A-to-D gain setting, and filter(s) used during the observation. The name of the graph and components tables (GRAPHTAB and COMPTAB) must be provided if this option is selected. The calibration software will create the appropriate photometry calibration table (rootname.c3t) and save its name in the header keyword, PHOTTAB.
