Thank you Paolo and Christian.
No I haven't joined the RR Lyr campaign yet. This was a trial run first to see how things went.
Unfortunately we are getting very few clear nights at the moment so the probability of a maximum and a clear night is not great.
To answer Christians questions. This series used 360 sec exposures and with the readout time included the interval came to about 372 sec.
The telescope is a home built 310 mm corrected Dall Kirkham cassegrain. The spectrograph is also home built.
I have described it on this forum previously - here is the link:
http://www.spectro-aras.com/forum/viewt ... ?f=8&t=811
And Christian - thank you - I went to your web site hundreds of times for information during the design and building of the spectrograph.
I can reach a resolution of 2.8 A FWHM over much of the visible range, but focus of the camera lens is critical and I do not always achieve this.
For this series of spectra ISIS reported a resolution of 1815.
The Ha animation was just a magnified view from the full spectrum. I have done another one showing the He1 to Ha region. Christian you are right. The He1 absorption/emission feature is visible at the same time as the shock wave feature shows up in the Ha line.
- RR_Lyrae_He1-Ha-anim.gif (604.79 KiB) Viewed 13765 times
Tim