[PRejto (Peter)]

I would appreciate some feedback on this work flow in the beginning steps of calibration using subs from my Trius. I don't want to subtract dark frames. However, I do want to get rid of hot pix and use a flat frame master using CCDStack.

1. Select the master bias frame as a "dark" in CCDstack calibration tool
2. Select "none" for adaptive subtraction.
3. Select proper master flat.
4. run calibration
5. Go to Process/Data Reject/Hot Pix strength 4, run
6. Interpolate rejected pix: width .2, iterations 3
7. Proceed to registration.

Or, is it better to make a bad pixel map first from a master dark and as a first step use the pixel map to eliminate the hot pix by interpolation followed by steps 1-4?

I'm also a bit confused about the bias subtraction. When making the master flat CCDStack asks if I want to subtract the bias. I've always indicated "yes." I assume that by subtracting the bias during calibration (instead of a dark) this does not present a conflict.

Any advice much appreciated.

Thanks,

Peter