ESHEL first light

Design, construction, tuning of spectroscopes
Information and discussion about softwares (telescope remote, autoguiding, acquisition, spectral processing ...)
Francois Teyssier
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Location: Rouen
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ESHEL first light

Post by Francois Teyssier »

First light for my eShel
Just after alp CMi
bet CMi
betcmi.PNG
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François
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: ESHEL first light

Post by Olivier GARDE »

François,

Super, je vois que le parc de spectro s'agrandit....
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Francois Teyssier
Posts: 1545
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: ESHEL first light

Post by Francois Teyssier »

"Extension du domaine de la spectro"
Ca marche bien.
CH Cygni ce matin
chcygni.PNG
chcygni.PNG (40.71 KiB) Viewed 7145 times
Il ne me reste plus (?) ... qu'à maîtriser le traitement
Probléme : j'ai acquis les images avec MaximDl. J'ai vu dans un post que tu as a été confronté au probléme de l'inversion des images. Du nouveau depuis ? Comment as-tu résolu la difficulté ?

Amitiés

François
Olivier GARDE
Posts: 1267
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Location: Rhône Alpes FRANCE
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Re: ESHEL first light

Post by Olivier GARDE »

François

En fait pour corriger le problème avec Maxim DL, j'oriente la caméra CCD de façon à avoir la partie rouge du spectre en bas de l'image, et comme cela l'image est bien orienté pour ISIS ensuite.

C'est un problème d'origine de coordonnées de l'image, pour l'un l'origine est en haut à gauche de l'image (maximDL), pour l'autre en bas à gauche.
Voici ce que j'obtiens avec Maxim DL et le Thorium
Image

Et cette même image du Thorium ouverte avec un autre soft que Maxim DL
Image

Il y a donc un effet "miroir vertical" entre les 2.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Martin Dubs
Posts: 142
Joined: Fri Jan 06, 2012 9:16 pm
Location: Maienfeld, Switzerland

Re: ESHEL first light

Post by Martin Dubs »

Hello Francois,

Maxim writes and reads the images in a different way from ISIS, Audela and other programs. The main point is that they look the right way when opened in ISIS, red at the top for a correct analysis. For the images already taken you can flip them vertically in Maxim by a maual operation or a batch command (under: view - batch process window). For further spectra you can flip them when setting up the camera in Maxim under
- camera control
- options
- flip vertically
However I think it is easier to use Audela for taking the spectra unless you use a camera which is not supported. I use Audela for taking spectra and for guiding.

Best regards,

Martin
Francois Teyssier
Posts: 1545
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
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Re: ESHEL first light

Post by Francois Teyssier »

Thank you Olivier & Martin,

I used the flip option in Maxim.
OK, but, strangly I have had also to flip horizontally
Here's the result in ISIS
I think it's OK ?
Thor.PNG
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Cheers,

François
Martin Dubs
Posts: 142
Joined: Fri Jan 06, 2012 9:16 pm
Location: Maienfeld, Switzerland

Re: ESHEL first light

Post by Martin Dubs »

Hi Francois,

instead of flipping horizontally and vertically you can also rotate the camera by 180°, this should have the same effect. The image looks OK, but focusing can be improved as explained in my attached notes, which I wrote while setting up my echelle. They should apply as well to your echelle. In short if your collimator is not focused correctly the convergent beam on the grating produces astigmatism, visible as different slant of the ThAr lines in different orders. With correct focusing of the collimator (and camera lens) you will get nice round spectral lines :) .

Regards, Martin
Attachments
Echelle_2011_3 astigmatism.zip
correction of echelle astigmatism
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Francois Teyssier
Posts: 1545
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: ESHEL first light

Post by Francois Teyssier »

Thank you Martin,
Impressive improvment
My work for next week-end
François
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: ESHEL first light

Post by Paolo Berardi »

I join the interesting group conversation only to congratulate François for the eShel first light. A great step forward in your spectroscopic activity!

Clear sky!
Paolo
Vincent Bouttard

Re: ESHEL first light

Post by Vincent Bouttard »

François,

Félicitations pour cette bête de course. Les cataclysmiques et les novae n'ont qu'à bien se tenir maintenant.
Ca laisse augurer des résultats fantastiques.

Vincent
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