[AAVSO-HEN] Help ID a mystery flash?

[Patrick Wiggins]

While examining a series pictures I shot last night I found that a  
couple of them appear to show "something" flaring.

In the first frame there is nothing.  The next taken about 23 minutes  
later shows something appearing.  Image 3 taken 20 minutes after that  
shows whatever it is brighter still.  In image 4 taken 32 minutes  
later the flare is gone.

I went back and shot several more pictures of the area but there was  
nothing there.

I'm guessing it's just an artifact of the camera (a ghost image,  
perhaps?) and initially planned to delete the pictures.  But after  
the recent naked eye GRB I figured it best to err on the side of  
caution and mention it here and let others have a look.

Details:  The scope is a C-14 operating at f/11.  The camera is an  
SBIG ST-10XME binned 3x3 and chilled to -25.  No filter.  Exposure is  
120".  Image was taken from 40.64 N 112.295 W.  Pictures were taken  
this morning (the 22nd) between 10:12 and 11:27 UT (exact times are  
in the FITs headers).

I zipped all four images into a single file and posted them to:
http://users.wirelessbeehive.com/~paw/temp/FLARE01.ZIP

All opinions welcome,

patrick
IAU 718