Newbie problem with BIAS frames - Incompatible Image Geometry

[stevek]

Just starting out !
I have a Atik 460 CCD.  I took 20 BIAS frames with the CCD with and integrated them with Integration tool.

I now try to calibrate my light frames (taken with same CCD) with only BIAS (no darks or flats).  I get "Incompatible Image Geometry".  Hmmm.  OK, so now I try one of the uncalibrated BIAS frames.  Same problem.  Whats wrong do you think? Seems something wrong with my BIAS but why?  I took them with the same CCD so dimensions etc are correct.  Took them with shortest exposure with Artemis as you are supposed to with BIAS.....

Anyone help please?  I am stuck...! 

Steve

[GJL]

Maybe Binning is different.

CS  Gerhard

[stevek]

Yes indeed!  Binning different!  Sorted   I took another set pf 2x2 BIAS and it worked

So I have now calibrated, registered and integrated my RGB channels at 2x2.  How do you use the luminance channel because that is binned 1x1?

[sreilly]

After processing the luminance and RGB channels you can register the images using Dynamic Align and then combine.

[stevek]

Thanks!  Yes, watching Harry's videos and just done that one minute ago!  Thanks guys for helping this newbie!  There is a lot to learn :-)