V460Cyg a Carbon star spectrum

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Nacho Novalbos
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Joined: Mon Mar 08, 2021 8:57 pm
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V460Cyg a Carbon star spectrum

Post by Nacho Novalbos »

Good evening spectroscopists!!

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

Image
Image
Image

Comparing it with HD34467 (carbon star class C6,3), they are quite similar. :D
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.
Nacho Novalbos
O.A.N.L. Barcelona
https://oanlbcn.blogspot.com/
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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Re: V460Cyg a Carbon star spectrum

Post by 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
DADOS_specification.png (110.97 KiB) Viewed 1998 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
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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