Quote:
Originally Posted by theodog
Hi Al,
Do you do all the processing frames; flats, dark, bias?
I have the same issues that my instrument responce seems untransferable but I figure it's because I only do darks.
I had the same thoughts about instrument responce for all classes.
Perhaps we could use others final spectra as library and compare?
It will be the weekend before I'm up and running again.
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G'Day Jeff
I haven't been doing darks or flats at all.
So far most of my spectra have been captured as AVIs and stacked in registax, so that smooths out the noise. So far it's only Eta Carinae that I've captured as a still (as it's not very bright). But you are right, subtracting a dark should remove a lot of the black point noise if it is due to brightness/gain settings on the camera.
Subtracting the black point offset in VSpec should have a similar effect though.
Al.