FreeLists / az-observing / [AZ-Observing] Re: 9/P Tempel Impact light Curve

["Stanley A. Gorodenski" <stan_gorodenski@xxxxxxxxxxxxx>]

Very nice. For my own education, how did you measure the magnitude? 
E.g., did you total pixal readings over a square area? If so, how large 
a square, and how were you able to keep it in the same location from 
frame to frame?
Stan

Andrew Cooper wrote:

><>
>I made an attempt to pull light curve data out of my frames.  The 
>resulting curve can be seen at the bottom of my hompage at 
>http://www.siowl.com. 
>
>It looks like a little less than 0.4 magnitudes change smoothly 
>increasing for about 20minutes then leveling off.  Two runs before 
>impact and a single run after the data shown in my graph show no change 
>in brightness and are quite flat.  I was really uncertian about my 
>absolute magnitude calibration so just normalized the start of the run 
>to 10.0 somewhat arbitrarily.
>
>Andrew
>
>
>Andrew Cooper
>----------------------------------------------------
>http://www.siowl.com
>
>
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