Re: fun with coadding images on Disk Set 19

[Tom Droege <tdroege@veriomail.com>]

Dirk and all interested data munchers,

Here is a list of the data frames I have.  In general, the later dates are 
better data.  The RA listed is within 1 Degree for the later dates.  Some 
of the earlier dates have big RA errors.  All data is taken at a nominal 
center Declination of +4 Degrees, 30 Seconds.

I would go for things near the center of these ranges.  If there is a range 
of interest, then I will check the actual frames against a star atlas to 
get a closer estimate of where the telescope is pointing.

Many of the earlier runs have ice crystals on the V camera.  I seemed to 
have learned now hot to keep them off.  The best VI pairs will be for later 
runs.

I will be happy to send out data sets for those interested in looking at 
some particular object to generate a calibration.

Some of the earlier runs contained only 50 images.  All the later runs have 
56 VI image pairs.  Not all have flat field runs to go with the data 
runs.  I find little change in the flat field from night to night.  This 
also should hold true for the darks which should vary less than the noise 
when up to the operating temperature.  Now that it has cooled down, I am 
running at -17 C on both cameras.

All fields are 4x4 degrees centered around +4D30m and the indicated RA.

Available runs of 56 VI image pairs:

Date            RA
010905          20h07m
010908          19h29m
010909          19h20m
                 23h17m
                 01h48m
010910          23h11m
                 01h41m
010911          01h42m
                 23h36m
                 02h07m
010924          22h09m
                 00h40m
                 03h11m
010926          20h34m
                 23h06m
                 01h36m
                 04h07m
010927          21h27m
010929          21h03m
                 02h06m
                 04h37m
010930          20h03m
011001          20h19m
                 22h50m
                 03h52m
010002          20h44m
                 23h14m
010003          19h47m
                 22h18m
011006          21h32m
                 00h03m
                 02h34m
                 05h04m
011017          21h09m
                 23h40m
                 02h11m
                 04h42m


Tom Droege

At 01:01 PM 10/18/01 -0600, you wrote:
>Do you have a rough idea of the RA range you've been covering lately?
>
>Dirk