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From: Mel Ulmer <ulmer@marie.astro.northwestern.edu>
Subject: followup question
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Private message: yes  no

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Date: Mon, 9 Feb 2004 08:09:38 -0600 (CST)
From: Mel Ulmer <ulmer@marie.astro.northwestern.edu>
To: Norbert Schartel <xmmhelp@xmm.vilspa.esa.es>
Subject: followup question
Dear Norbert,

I probably won't need this information, but while we've been in contact, I 
might as well make sure I understand:

What kind of time do we have, i.e. geocentric? heliocentric,
barycentric?  ITA, etc.?

-- 
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Mel Ulmer              mailing address: Prof. Melville P. Ulmer
mailto:m-ulmer2@northwestern.edu        Dept. of Physics & Astronomy
voice 847-491-5633                      Dearborn Observatory
fax 847 491 3135                        2131 Tech Drive
secretary phones 491-7650               Northwestern University
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www.astro.northwestern.edu/~ulmer/
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From: Matteo Guainazzi <xmmhelp@xmm.vilspa.esa.es>
To: m-ulmer2@northwestern.edu
Subject: Re: followup question (PR#10143)
Date: Wed Feb 11 16:20:16 2004
Dear Mel,

 times are in the event lists are Terrestial Times, corrected to the centre of
the readout frame.

 Barycentric times can be obtained after correcting through the SAS tool
"barycen".

 Regards, Matteo


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