Compatibility issues

Dear All,

the ASTRO-H collaboration has released some time ago the spectral responses and ARFs based on the expectations they have for the instrument performances. Being part of the science working group of the mission (but not of the instrument or s/w teams), I have tried to simulate some spectra. 

I wanted to use Isis to simulate narrow emission lines, but the provided files are compatible with Xspec (at least the ones for the calorimeter) but not with Isis. After a quick investigation, I have not yet found the reason. As you are unfortunately quite used to these problems, it might be that finding the reason will take only a few minutes for you, so I have decided to write this message. The rsp and arf files are in:

http://dl.dropbox.com/u/82756855/rsp_files.tgz

while the output of the screen is

****
isis> require("xspec");
 Solar Abundance Vector set to angr:  Anders E. & Grevesse N. Geochimica et Cosmochimica Acta 53, 197 (1989)
 Cross Section Table set to bcmc:  Balucinska-Church and McCammon, 1998
isis> sxs_a = load_arf("sxt-s_100208_ts02um_intallpxl.arf.gz");
Keyword not set: EXPOSURE
isis> sxs_r = load_rmf("ah_sxs_5ev_basefilt_20100712.rmf.gz");
isis>
isis> assign_arf(sxs_a,1);  % Dataset 1 = HEG-1
isis>
isis> assign_rmf(sxs_r,1);  % Dataset 1 = HEG-1
Error: 16384 RMF bins vs 16384 ARF bins
Largest fractional errors:  1.19202e-07 (low edge)  0.995 (high edge)
Failed: assigning RMF 1 to data set 1
***

Many thanks for your support and apologies for the disturbance

Regards,

Carlo


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