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Impressionnant comme setup d'observation en spectroscopie !!!! C'est finalement le système idéal pour faire à la fois de l'observation en haute résolution et basse résolution en ayant 2 spectrographes différents et complémentaires. Coté stabilité du spectrographe echelle, est ce que vous l'avez régu...

Très intéressant comme spectre et les possibilités offertes pour suivre cette cible peut commune.

Joan, Thank you for your answer. I will try to do spectroscopy on binary stars to find the compagnion period or more periodic event on multiple stars. I will use a Planewave 17' on a GM3000 HPS 10 micronI have many camera like ATIK 460 or ASI 6200. Could you please give more information about effici...

Do people use the Baches model on this forum ?
In this case what's your feedback on this spectrograph ?

Thank you Joan for your answer but I didn't find this following caracteristics for Nou-T :
- Weigth
- Efficiency
- Accurency/precision

And do you have an image of the autoguiding field of the Nou-T spectrograph ?

Thanks James and Olivier for your answers. For the precision part, I therefore have information on Baches and eShel. On another topic on this forum, I found this publication which confirms the one indicated by James for the eShel : https://iopscience.iop.org/article/10.1088/1538-3873/128/969/115001/...

Je vais m'orienter vers un spectrographe multiordre de type echelle et j'ai repéré 4 modèles : - Baches de chez Baader : https://www.baader-planetarium.com/en/spectroscopy/baches-echelle-spectrograph-2937.html - Eshel de chez Shelyak : https://www.shelyak.com/produit/pf0011-spectroscope-eshel/ - Lyn...

@Joan : Thank you, but first, I would like to collect as much information as possible about each spectrograph (Resolution, wavelength domain and range, efficiency, stability, size, weight, compatibility with this or that telescope or refractor, etc..) And then, the choice between a commercial device...

@ Joan : I would like to mesure radial velocity from binary stars. But also take spectra from very faint target (of course with not the same resolution) As it is not possible to have a universal spectrograph, it's therefore necessary to be able to choose the right spectrograph according to the use t...

Dans ma quête d'avoir un spectrographe, j'essaie de recenser les divers instruments. Voici la liste des instruments que j'ai pu trouver sur ce forum ou sur le net : - Star Analyser : https://www.rspec-astro.com/star-analyser/ - Alpy 600 : https://www.shelyak.com/produit/alpy-600/ - Low Spec : en imp...