fitting LETG/ACIS-S data in Sherpa

From: Larry David (lpd@head-cfa.harvard.edu)
Date: Thu Dec 07 2000 - 09:43:47 EST


Hi,

I have been fitting LETG/ACIS-S observations of PKS2155-304 over the
past month and have produced several log files that worked fine in
the old CIAO. I just tried to fit the data in Sherpa using the
exact same sequence of commands as before, and I now get the error

sherpa> fit 3
Error: RSP Error has been detected.
  - Not RMF read in.
    
I have never specified an rmf file before. I don't need one
since this is a continuum source. I tried typing

sherpa> legm1.rmf=acisleg1D1999-07-22rmfN0001.fits

and the fit command worked, but the answer was wrong. Also
the best fit model did not include the arf information.

Note: m1 corresponds to model 3 (sherpa> instrument 3 = legm1)

Any ideas?

Larry



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