A multiplicative table model. The filename to be used should be given immediately after mtable in the model command. For example
XSPEC> model mtable{mymod.mod} ...
uses mymod.mod as the input for the model. For specifications of the table model file, see the OGIP memo 92-009 on the FITS file format for table model files (available on the WWW or by anonymous ftp from legacy.gsfc.nasa.gov under caldb/docs/memos).