Low spectra of CH Cyg and BF Cyg required

[Timo Kantola]

Hi!
I did gif animation my low res CH Cyg observations 31.7,19.8 and 29.8.2018.
Sorry for the vague quality compared to your pros. However, I decided to share this, because I think that there are all kinds of things happening there, however, no glue what.
Wide range changes possibly resulting different reference stars 31.7 Vega, 19.8 and 29.8 HD181470, and varying humidity conditions and my inexperties. First is "full spectrun 3750-7400Å and second is same "zoomed" 3750-4950Å.
30cm F4 Newton + Alpy600 + Atik314L+

[Francois Teyssier]

Hello Timo,
It looks good results at a first glance.
At least some of the variations are real. See for instance H beta according to the continuum
Your spectra are welcome in the database

François

[James Foster]

Here is a Medium/Low resolution spectra of CH Cyg made from three different sets of spectra taken with the LhiresIII:

As usual, all lines identified, except the balmer, are speculative.

I shot the Ha/Hb on 27July19 and the H-del centered one the following (28July19) night. Shooting Ha/Hb is relatively simple
using my robofocus controlled micrometer (see: http://spectro-aras.com/forum/viewtopic ... ocus#p9993),
however when shooting near H-delta, the LhiresIII interior condenser lens must be rotated almost 1 turn to get properly focused lines
to 3800A.

James