spectro-aras.com

Last Friday I couldn't resist shooting KIC 8462852:
(6 x 1200 sec)

Wikipedia tells it is F3 V/IV (en.wikipedia.org/wiki/KIC_8462852) while ISIS has only the closest F2II in Pickles catalogue, which looks really a good match, but for some reason I had a 4A skew at the two visible Balmer absorptions (mistery, as I've taken other stars that night having it normal): The RMS was 0.338338 (fitted 9 lines, order 4).

Clear skies,
Peter

Just to check my wavelength skew using the 150/mm grating, I've taken it again with the 600/mm + 35um slit (R~2300, 2 x 20 minute):
The variance around the continuum is definitely just noise, but the wavelength is much healthier now. It tells nothing to do with it.

At LoRes, I think I forgot to take a new calibration after throwing out the 1st image (+ again on the next... I was a bit careless knowing it's not for the database). And didn't shoot 2 calibration frames before and after the 1st shot, then using wavelength registration afterwards like I did it now.
This tells me the lesson how to make calibration better with LHires and what to expect if I don't do it that way.

- Peter