Hi All,
haven't done this for a while, but I imaged some spectra a couple of weeks back and finally got them processed this afternoon. I took a number of carbon star spectra, selected from the Stephenson star catalogue, and in a convenient position for me to image.
I find them interesting due to their pronounced absorption lines, mainly relating the various cyanogen compounds formed in their outer shells, plus TiO2 + other complex molecules.
Looking to get a S class star spectra, as they are even cooler than the N or C class....a bit of a challenge..
Also added a Neptune spectra, with the sun spectra (G2V) removed.
cheers
Mark