Hi Steve,
Nice spectrum!
Interesting to see how Chi Cyg looked in July. It is a difficult to be sure with our different setups, but I wonder if there is a hint of the hydrogen emission lines weakening from July to August. Though this is obvious when comparing the spectra on the screen, I wonder if this might be an effect of different resolutions. We’d probably need to get an accurate measure of equivalent widths to be sure.
I’m looking forward to the October meeting.
Best wishes,
Andy