Suspected/Misclassified Symbiotics: spectra required

Re: Suspected/Misclassified Symbiotics: spectra required

Postby Francois Teyssier » Sat Aug 01, 2020 3:49 pm

Great results
Congratulations to All

V2044 Oph could be promising (He I + He II ?). This is good result on a faint and low target.
I'd suggest to observers further south to get a spectrum with a better SNR

All the best,
François
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Re: Suspected/Misclassified Symbiotics: spectra required

Postby Hubert Boussier » Sat Aug 01, 2020 7:00 pm

Bonsoir François,

L'étoile que j'ai faite, c'est V2204 Oph et pas V2044, j'espère que je n'ai pas fait une cible non demandée.

Le problème ce n'est pas d'être plus au Sud, mais d'avoir un très grand arbre plein Sud (bien content de l'avoir quand même en ce moment, car il fait un peu d'ombre).

Hubert
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Re: Suspected/Misclassified Symbiotics: spectra required

Postby Francois Teyssier » Sat Aug 01, 2020 10:41 pm

Désolé Hubert,
C'est bien V2204 Oph la cible, une coquile de ma part.

François
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Re: Suspected/Misclassified Symbiotics: spectra required

Postby Terry Bohlsen » Sun Aug 02, 2020 7:33 am

Hi
I have taken spectra of EC19249-7343 and V618 Sgr.
V618 Sgr seems to have NaI emission and a very weak Ha emission.
Terry.
ec19249-7343_20200730_455_TBohlsen.png

v618sgr_20200730_496_TBohlsen.png
Terry Bohlsen
Armidale NSW
Australia
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Re: Suspected/Misclassified Symbiotics: spectra required

Postby Peter Velez » Thu Aug 06, 2020 6:18 am

Here is my spectrum for V2204 Oph. Its consistent with Hubert's work last week. Apart from Balmer lines, I've noted He I and He II emission lines. This plot has been adjusted for HRV and radial velocity of -428 km/s reported in Simbad for line identification.

Taken with Atik 460EX through a LISA (19 micron slit).

I agree with Hubert - this is faint! I have switched back to unbinned images and the 19 micron slit with a view to tightening up my spectral calibration. I achieved this (hooray!) but at the expense of SNR. It was a full moon and I should be able to improve on this in a week or so. It is very favourably located for me in Aus.

I will send the .fit file to Francois.

Pete
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v2204_oph_20200805_384_Peter Velez_annotated.png
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Re: Suspected/Misclassified Symbiotics: spectra required

Postby Francois Teyssier » Thu Aug 06, 2020 6:49 am

Hi Peter, that's great
You clearly identify the target as a symbiotic star with the He II 4686 line which was suspected but not obvious in Hubert' spectrum.
Thanks to All,
All the best,
François
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