Quote:
Originally Posted by Merlin66
Clear through until about 3:30am....
Screwed up the camera settings and ended up with 2 x 2 binning! This reduced the resolution to around R=1600.
The P Cygni at Ha and Hb give around 1500-1600 Km/s.
No dramatic changes that I can see......
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Very nice job Ken! FWIW, here's my low-res spectrum from last night.
I've had a light-globe moment with my spectra, particularly the relative intensity of Ha & Hb showing in my graphs of V1369 Cen. I shoot only in jpeg and the method I use to create the graphs is to grayscale the bar spectrum and save as FIT files using Registax. The red of Ha, no matter how intense, is never going to be 'less grey' than the cyan of Hb so the graph simply won't display the relative intensity of Ha that shows in the line or bar spectrum.
The answer would be to shoot in RAW and do whatever it takes to transfer the luminosity rather than shade to a bar spectrum and hence to the graph. But unfortunately that's a step I'm unwilling to take. Aside from the fact that my poor old computer has convulsions just dealing with full-size jpegs, I'm quite happy with my level of commitment equipment & time-wise to spectroscopy. I have lots of other keen interests in astronomy (comets, comet search, nova search, RNe etc) - I'm not retired, have a very busy life and there's just no time left!
So you guys might just have to put up with my wonky spectra!
Ken, I'll contact you shortly off-forum.
Cheers -