From jcirtain@head.cfa.harvard.edu Sun Jun 12 09:19:25 2005
Date: Sun, 12 Jun 2005 09:19:25 -0400 (EDT)
From: Jonathan Cirtain <jcirtain@head.cfa.harvard.edu>
To: Mark Weber <mweber@head.cfa.harvard.edu>
Cc: Leon Golub <golub@head.cfa.harvard.edu>, Ed Deluca <deluca@head.cfa.harvard.edu>, Jay Bookbinder <jbookbinder@cfa.harvard.edu>, Bill Podgorski <wpodgorski@cfa.harvard.edu>, Peter Cheimets <pcheimets@cfa.harvard.edu>, mario cosmo <mcosmo@cfa.harvard.edu>, Jason Scott <jscott@head.cfa.harvard.edu>
Subject: E2E 20050611 Shift-A Science Report.

The Mirror temperature gradient test was delayed to increase the chamber
temperature to 15 C. This was required since the heaters were saturating
and incapable of setting up the required gradient. The temperature
gradient was achieved late during shift A and the test completed. We were
able to complete the anaysis of the PSF as a function of focus position
with the temperature gradient in the tube, and the best focus position was
found to be > 13 um. This is within the error in the measurement, so the
telescope is insensitive to the gradient. Mark and I have also completed
the CCD linearity measurements and a characterization of the dark signal
as a function of exposure duration. He has put *final* versions of these
plots on the shift B web site. Testing will continue this evening and the
PSF core vs focus position for the temperature gradient test will be
placed on the Shift B page. 

--Jonathan

_____________________________________________________________________________
Dr. Jonathan W. Cirtain                 |60 Garden St.
High Energy Astrophysics Division       |Mail Stop 58 
Center For Astrophysics                 |Cambridge MA, 02138
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