atable: tabulated additive model
An additive table model component. The filename to be used must be given immediately after atable in the model command. For example
model atable{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 ftp://legacy.gsfc.nasa.gov/caldb/docs/memos . Example additive table model files are mekal.mod and raysmith.mod in $HEADAS/../spectral/modelIonData and testpo.mod in $HEADAS/../spectral/session.
Any number of tabulated model components (additive, multiplicative or exponential) may be used simultaneously.