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Thanks Olivier for the image. In order to evaluate how to develop the Sindex pipeline and building a kind of DB, Christian, Olivier, others, could you please send me an example of your 1D extracted and wavelength-calibrated H&K spectrum ? I will see how I can proceed these spectra coherently to ...

Dear all, First of all, I would like to congratulate you for your enthusiasm in this project and especially your very high reactivity in performing outstanding observations, using impressively high-resolution spectrographs. All of this is really encouraging and should be further explored. You have a...

Hello,
I'm Alexandre Santerne, astrophysicist at Aix-Marseille University / Laboratoire d'Astrophysique.

cheers,
Alex

Hi Olivier, If the P-cygni profile of Halpha match fairly well between SOPHIE or even HARPS-N and ESP, it does not mean the spectral resolution of ESP is as high as 75k or 110k. It just means the H-alpha profile is broad enough that it is not dominated by the resolution of the spectrograph. Even if ...

Hi Olivier, Very nice. You start to reach what I call moderate spectroscopic resolution ;-) Not so bad ! But for cosmologists, this is extremely high resolution. Note that the SOPHIE spectrum I took a couple of years ago was in the high-resolution mode, hence R=75k. Do you also have the HARPS-N one,...

Dear all, Since the Halpha profile present very similar profile, I checked other spectral domains which present some differences: line1.jpg line2.jpg line3.jpg line4.jpg I have no idea why those lines present a different profile between the two spectra, while the Halpha is the same. Maybe the monito...

Dear all, Following the observation of P cygni by all the spectrographs this summer during the OHP workshop, where I observed the star with SOPHIE, I renew the observation last night with the HARPS-N spectrograph. This spectrograph is mounted at the 3.6-m telescope TNG, the italian telescope at La P...

Salut Olivier, Je ne pense pas que ton installation soit stable sur le long terme à quelques m/s (c'est déjà pas le cas pour SOPHIE), ce qui est pas très grave. Ce qu'on cherche à savoir, c'est la variation sur quelques heures pour savoir tous les combien il faut faire un thorium pour ne pas trop dé...

Salut Olivier, Stéphane, C'est sur que si le peltier de Stéphane envoie de l'air frais directement sur le spectro, cela risque de créer un gradient de température dans le spectro lui-même, ce qui fera plus de mal que de bien. Cela dit, si tu positionnes une petite plaque isolante à quelques centimèt...

Excellent Olivier,

J'ai hâte de voir ta stabilité en vitesse radiale…

Amitiés,

Alexandre