I may have more interest in this than in mere observing, as much as I do enjoy that. I mean, the stars are pretty at any magnification but you do not know (much) more than you did before. So, how did you learn to do this?
Organic Astrochemist, on 21 Nov 2020 - 2:30 PM, said:
Here's what I was able to get in about half an hour on RV Tauri (mag 9.5V) in my horribly light polluted backyard with my 8" f/4 and an ALPY 600.
The Na I D doublet also taught me a lesson.
The resolving power for this spectrum was ~1100, so I should be able to see some separation between the two sodium lines and 589.0 & 589.6 nm, but the peak rising up between the two was actually produced by light pollution. With only 30 minutes on a mag 10 star I was getting a S/N of betwen 10 and 20. This let me see a lot of objects that night, but there was a cost.
Bachelor #2, same question. I have looked at the equipment for sale at Field Tested Systems, but they don't sell books. I have a standard university freshman book in astronomy (Chaisson McMillan) and it has a chapter on Spectroscopy. But it doesn't tell you how to do this anymore than it discusses the eyepieces suitable for a fast Newtonian. So, how did you learn how to do this?
robin_astro, on 22 Nov 2020 - 3:26 PM, said:
The effect of 0.66 reddening on a K0iii spectrum. The result resembles your RV Tau spectrum
ISIS has a reddening/dereddening tool, (under the misc tab) that you could try it on your spectrum
To me, it seems like an attainable goal for any amateur astronomer. In fact, the AAS opened up to amateurs in 2016 with a special membership category. AAS publicist Rick Fienberg explained that 100 years ago, amateurs excluded themselves for lack of sophisiticated equipment in photography and spectroscopy. But that changed, back in the 1980s in fact. So, it was about time that the AAS opened the doors again. But as I said above, support seems lacking. I mean, the first time that I went to our club's dark sky sight, the outreach chair spent an hour with me pointing out constellations with his green laser. Having grown up and living in the city, I was surprised (awe-struck) at how easily they are lost. I felt like Dave Bowman in 2001: "My God! It's full of stars!" Anyway, there's no one in our club who can talk for an hour about spectroscopy. What do you suggest?