First, the good news -
I have found an old stick full of data from 2021... previously thought lost. (Quite excited, as my laptop was stolen in 2022 along with much of my astro data.. so this is huge.
And the bad news - In 2021, for whatever reason, I imaged two different targets so that some of my subs are messed up.
Specifically, I have discovered that all of my subs for a two different targets (in this case M31) display only in grayscale, despite all data being taken with my 2600 MC OSC.
I am seeking advice on how to restore colour to these subs and thereby process the image normally. Frankly I think I messed up with a setting in the software (ASIair) during acquisition.
To provide some details here is a sample (below) of what the FITS data provides of a sample image (5 min, Stellarvue triplet 70 mm, 2600 MC).
I thought of trying to use spectrophotometric calibration in PI, but am guessing thats not going to work.
Thanks in advance.
Ian
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Data on the image sub:
And here is a single 5 minute sub... stretched but nothing else done, to show you what I'm dealing with.
