Hi Ken,
i did get a spectra of Alpha Volans, and A2v star to do just that but I was getting what I thought an unusual result when I divided my capture with A2v reference in the BASS software.
I posted a question on the group.IO site and John and yourself commented on the next step. I just haven't done it yet.
From what I can see, the B+W chip in the DSi3 collects further into the blue end than other CCD's I have imaged with.
I've added the partially processed images.
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