Hello! I had an interesting hot pixel effect from my images of DY HER last night.
I took 60 images in each B,V,I filter over about 4 hours. I checked all the raw images discarded few that had poor tracking of focus problems
After I performed the photometry and uploaded the data, I noticed 5 data points in each filter during the same 20 minute time frame that were about 0.3 magnitudes dimmer than the baseline curve and formed a new shallow depression in the curve. Naturally, I got excited - something unusual was happening!
Of course, after checking the images, those 15 images had a hot pixel inside or just next to one of the comps, hence the unusual behavior.
I'm not sure how to check raw images for such a problem. It was pretty subtle since the comp star made the hot pixel difficult to see. It just reinforces to me that I need to double check the data after upload and then go back to the actual images to see if an artifact occurred that made the photometry act weird. Best regards.
Mike