Renormalize model, or change renorm conditions.
Syntax: renorm [AUTO | NONE | PREFIT]
The renorm command will adjust the normalizations of the model by a single multiplication factor, which is chosen to minimize the fit statistic.Such a renorm will be performed explicitly whenever the command is used without a key-word, or during certain XSPEC commands, as determined by the following key-words:
AUTO – Renormalize after a model or newpar command, and at the beginning of a fit
PREFIT – Renormalize only at the beginning of a fit
NONE – Perform no automatic renormalizations, i.e., only perform them when a renorm command is given explicitly.