Subject: Some tests with OSA 5

    Dear Carol Anne,

    OSA 5 is almost done, and at last I had some time and possibility to 
test
somewhat spectral extraction from JEM-X. Data from Revs. 0044 and 0170
were used, scws with off-set angles smaller than 3 deg. Running jemx_
science_analysis I used all default settings. Two attached figures show
comparison with the Crab canonical model (slope 2.1, normalization 9.7,
absorption 0.285). Spectra from OSA 5 are shown with black and OSA 4.2
with white.

    For both JEM-X 1 and JEM-X 2, compared to OSA 4.2, the absolute
normalization in OSA 5 is in better agreement with the canonical value,
spectra seem to be a little bit smoother, and only for 0044 the spectrum
is slightly steeper than model above 10 keV.

    However, the feature around 5 keV is still present. The 
intrinsically narrow
line at this position should have about 0.9 keV FWHM, then it may be really
something artificial, because that feature is quite narrow. Could you please
provide me a more detailed "howto" on extraction spectrum from raw data?
I think I will try to test this possibility.

    The link given by you in the last email seems to not work:
http://spacecenter.dk/~oxborrow/sdast/sdast_forum.html

with error:
The requested URL /~oxborrow/sdast/sdast_forum.html was not found on 
this server.

    Maybe there are some changes?

    Have a nice weekend, best wishes,

           Piotr




-- 
Piotr Lubinski
INTEGRAL Science Data Center    Phone:  +41 22 3792 146
16, Chemin d'Ecogia             Fax:    +41 22 3792 133
CH-1290 Versoix                 www:    http://isdc.unige.ch/


Date: Fri, 10 Jun 2005 14:31:21 +0200 (MEST)
From: Stefan Larsson <stefan@astro.su.se>
Subject: Re: Some tests with OSA 5
To: Piotr.Lubinski@obs.unige.ch
Cc: stefan@astro.su.se, Stephane.Paltani@obs.unige.ch, oxborrow@dsri.dk
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Dear Piotr,

Thanks for sending the results. 

>absorption 0.285). Spectra from OSA 5 are shown with black and OSA 4.2
>with white.

I guess red for OSA4.2?

I dont like the drop towards high energies for the rev 44 spectrum with
osa 5.0.

Do you know what the overideCollTilt parameter was set to?

What response file was used?

Cheers,

Stefan