V460Cyg a Carbon star spectrum

[Nacho Novalbos]

Good evening spectroscopists!!

Continuing with my learning process, here I leave the spectrum of V460Cyg...





Comparing it with HD34467 (carbon star class C6,3), they are quite similar.
The Swan C2 bands 4738Å, 5165Å, 5635Å, 6122Å, typical of this type of stars, are clearly observed.
A strong absorption line is also clearly identified in the area of the Na doublet 5890-5896Å, in addition to the SrI line in the 4607Å.
Being objective, I think my spectrum has a wavelength shift of about 6Å (I have to check why the X coordinate for the Ne 5944.82Å, after performing the calibration, is 842 and on the raw image of the calibration lamp is 847 ...Flexions??).
In any case, I am quite happy with the result... I would never have believed that a DADOS working with the 200 l/mm grating could take spectra with R=667.9

I will be very grateful for your comments and suggestions.

Greetings.

[Robin Leadbeater]

Hi Nacho,

I would be interested to see how faint you can go with the DADOS. The limiting magnitudes given in the manual seem rather poor to me.

DADOS_specification.png (110.97 KiB) Viewed 6207 times

Exact figures depend on many factors of course but I would expect to get ~3 magnitudes fainter than this at the same resolution and SNR using the same aperture and exposure with my ALPY600 and LHIRES

Cheers
Robin