Quote:
Originally Posted by ChrisV
Might be an old chesnut for some but not for me.
I've been calibrating my darks and flats with a master (super)bias in PI. Then calibrating my lights with these and the bias frame. Similar to this
http://www.lightvortexastronomy.com/...ixinsight.html
Writing it out now - it kind looks like a grammatically incorrect double negative?
So am I better off calibrating lights with darks and flats with dark flats. Then calibrating my lights with these calibrated darks and flats?
Sorry to hijack this Andy ...
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All you need are 5 to 9 or so Median combined, auto dark subtracted sky flats (one set for each filter)
and the around same number of darks (which match light frame exposure times) . Bias frames are not necessary, but can be used if don’t have darks for some odd reason.
I use MaxImCCD to calibrate data frames, but there are many alternatives.