[Aavso-photometry] Cosmic Rays

[Ben Davies]

Wolfgang,

I was testing this out on a smaller number of images and the artifacts 
were coming through ok because there is little else in the frame, these 
being residual images.  But I'm sure you are going to be right as the 
number of images grows.  Although, since this is just a quick look 
test,  you are able stretch it anyway you want.

I like the 'highest absolute deviant combine' routine!  Just don't 
happen to have one at hand.

Ben

>
>If you average/sum combine the differential images, you'll lower
>the detectability of the artifacts as they will just appear in a
>single image. If you combine 10 images, its just 1/10 of the
>difference in the affected original, if you combine 100 images,
>its just 1/100.
>
>Using something like a "higest absolute deviant combine"
>instead, should lead to much better results. I don't know if
>such an algo is implemented anywhere, but it should also
>be helpful in finding moving minior planets that are just barely
>above the background.
>
>Clear skies
>  Wolfgang
>
>  
>