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Last night was a good run. Except by morning I again lost all the coolant.
Sigh! The second floor ceiling is being soaked in anti-freeze, I fear.
The main run was 41 sets of images. Each set consists of a short, long,
short, long sequence in two filters. 2.6+ GBytes of data. It will take
4-5 CD ROMs to hold it. This was made at the request of Michael Richmond
who will get the whole set, along with a previous similar 3 CD set.
I also made a focus run with big steps for Andrew Bennett. He wants to
check on my focus mechanism.
At this point, I think the Mark IV is working as well as it is going to
work. I will do an experiment with stopping down the lens to see if that
improves the coma. Other than that I don't see much to do but go into
production and make everything work.
If anyone wants a specific kind of data set, let me know. My hope is that
Michael will look at the present data set and either declare the Mark IV
ready for science or talk me into doing further work.
This data set is noiser that I know I can achieve. To save wear and tear
on the TECs I
have been putting the cameras together without thermal grease. This means
that the CCD
CCD temperature is not as low as the thermometer reads. This is -20 C for
Arne, I know you wanted to see something, but I have lost track. Possibly
you would like to look at part of this data? I am getting close to
shipping out systems. I just don't want to set a date until I have ARNE
sitting here working.