[Aavso-photometry] Opinion needed

[Jim Roe]

I was taking a time series of CoRoT-2 hoping to catch a transit of its 
planet.  Clouds seemed to have cut off the onset and finish of the 
transit  ( :-( ) but in between the data seemed fairly smooth - except 
for the nearly 15 minute brightening shown in the light curve at

<http://jamesroe.com/CoRoT2-20080812.JPG>

Remember, the transit was going on during all of this data.

The target is the data represented by squares and two comp stars (in 
ensemble) are the diamonds.  The comp curve closest to the target is 
only 52 arcsecs away from the target, while the other is some 8 arcmin 
away (presumably negating potential flat field problems with the 
intermittent clouds?).

I can't see any obvious changes in the images involved.  Can anyone 
suggest what might have happened?  Is it worth following up in some manner?

Jim Roe [ROE]