[Aavso-photometry] Cosmic Rays

[Michael Newberry]

Ben,

Can you please explain exactly what your goal is? Are you trying to avoid 
measuring a star in an image if there is a cosmic ray nearby?

Michael Newberry

----- Original Message ----- 
From: "Ben Davies" <ben at davies.net>
To: <aavso-photometry at mira.aavso.org>
Sent: Friday, January 27, 2006 2:07 PM
Subject: Re: [Aavso-photometry] Cosmic Rays


> Here is a method I've come up with to analyze cosmic ray hits in 
> photometric images:
>
> - Make a median of all images.
> - Subtract this median from each of the images to get a set of images that 
> contain all the artifacts.
> - Average combine (or add, depending)  the artifact set.  Now one image 
> contains the defects and another contains the signal..
> - Blink the averaged image against the median.
>
> If no artifacts fall on or near the stars you are interested in, the job 
> is done.
> If an artifact does coincide, you just track down the offending image.
>
> I'm probably just stating the obvious here, but it took me a while to 
> figure it out
>
> Ben Davies
> http://ben.davies.net/
>
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