Re: loading etable models in ISIS

Dear John,


> add_mtable_model (file, "yourmodel")
> fit_fun ("... exp(yourmodel(1)) ... ");

   You mean exponential of negative  etable model. This works!
I can get the result as expected.

XSPEC12  has etable model command. I can get very similar fits with isis and xspec for the same etable model.

Thanks,

gulab



> 
> Here's a fuller explanation:
> 
> To evaluate xspec table models, isis uses the relevant
> functions provided by the xspec subroutine library.
> 
> The xspec11 subroutine library provided three such functions to
> support additive, multiplicative, and exponential table models,
> so isis provided interfaces for all three.
> 
> Early after the transition to xspec12, xspec12 provided no
> table model interface at all, so isis continued to support
> table models using the three xspec11 library functions.
> 
> Now that the Xspec12 subroutine library again provides
> functions to evaluate table models, isis has switched to the
> new interface. However, only the additive and multiplicative
> models are supported. No etable function is provided, so isis
> no longer provides an etable interface.
> 
> Nevertheless, I think etables should still be usable with the
> above workaround. Does that work with your model?
> 
> Thanks,
> -John
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