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45.5 Improvements to Calibration Reference Files

All of the installed reference files contain HISTORY keywords at the end of the header which can be viewed using the IRAF imhead task. These keywords contain more detailed information about how the file was created and installed in the database.

Several types of reference files and their associated calibration processes have been improved substantially. The following lists types of calibrations that may benefit from recalibration due to the improvements:

See the following sections and Chapter 46 for information on the various error sources in WF/PC-1 calibrated data and suggestions for further improving the calibration, particularly the flatfielding.

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