Search found 1449 matches

by Christian Buil
Thu Mar 14, 2024 5:02 pm
Forum: General Topics, Annoucements, Forum Life
Topic: Atelier en ligne STAROS : découvrez des outils innovants pour la spectroscopie
Replies: 7
Views: 420

Re: Atelier en ligne STAROS : découvrez des outils innovants pour la spectroscopie

Je n'ai pas une vision radicale, ce n'est pas mon truc, et je n'oppose pas la technique et la science que l'on peut faire avec. Oui, il faut une finalité, mas attention, cette finalité n'est pas obligatoirement de faire de la "science", un mot qui fait peur auprès de certaines personnes (à...
by Christian Buil
Tue Jun 13, 2023 11:14 am
Forum: Symbiotic Stars
Topic: T CrB before its new nova event
Replies: 22
Views: 14506

Re: T CrB before its new nova event

A high-resolution Star'Ex spectrum (R=19 000) made on June 13th from Antibes and like Guillaume B, using a small diameter, here an 80 mm Askar scope (model PHQ), all on an AM5 mount, and managed via ASIAir (except for the spectra storagel under Prism): http://www.astrosurf.com/buil/forum28/_tcrb_202...
by Christian Buil
Mon May 29, 2023 10:35 am
Forum: Symbiotic Stars
Topic: T CrB before its new nova event
Replies: 22
Views: 14506

Re: T CrB before its new nova event

Alpha evolution at high spectral resolution (instruments from 4 to 8 inch + Star'Ex HR, on ZWO AM5 mount) :

Image

C. Buil
by Christian Buil
Sun May 28, 2023 1:28 am
Forum: Software SpcAudace
Topic: fits-keywords for STAROS database and SpcAudace
Replies: 8
Views: 5412

Re: fits-keywords for STAROS database and SpcAudace

The next update will offer greater flexibility. For example, BESS_ESPR will be optional. Please note, however, that it is primarily up to the software designers to ensure that the data produced is as compatible as possible with the analysis applications (BESS, STAROS, ...), and not the other way rou...
by Christian Buil
Tue May 02, 2023 2:18 pm
Forum: Beginners corner
Topic: Test new configuration
Replies: 4
Views: 1514

Re: Test new configuration

It is indeed an artifact in one of the images of your spectrum (a badly corrected hot spot ?). It is not critical at all. Look at your 5 images one by one and you may find the origin. It is very easy to see that this is not a real line: the thinnest physical lines that can be observed are the tellur...
by Christian Buil
Mon Apr 17, 2023 12:22 pm
Forum: Spectra, results, information on activity ...
Topic: STAROS spectral data base
Replies: 2
Views: 4587

STAROS spectral data base

I announce the official launch of the STAROS public spectral database: https://staros-projects.org STAROS is a database whose originality is to address observation campaigns on an object at a time and for a limited time. For example, an observation project can be opened to follow the news (nova expl...
by Christian Buil
Mon Mar 06, 2023 12:59 am
Forum: Spectroscopes and Softwares
Topic: La spectrographie 2.0
Replies: 3
Views: 2955

Re: La spectrographie 2.0

Joan, Your questions are interesting and normal. My goal here is mainly to draw the attention of observers who use equipment that is not necessarily very expensive, but efficient, because it corresponds to the new technology. This is the case of astrophotographers: it doesn't take much to be able to...
by Christian Buil
Sat Feb 25, 2023 5:44 pm
Forum: Spectroscopes and Softwares
Topic: La spectrographie 2.0
Replies: 3
Views: 2955

La spectrographie 2.0

Un point de vue sur une autre façon de pratiquer la spectrographie aujourd'hui : moins chère, plus simple, plus ouverte :

http://www.astrosurf.com/buil/forum28/L ... hie_20.pdf

Christian Buil
by Christian Buil
Tue Feb 07, 2023 2:16 am
Forum: Comets
Topic: La Comète du début de l'année : C/2022 E3
Replies: 18
Views: 7804

Re: La Comète du début de l'année : C/2022 E3

Quelques spectres de C/2022 E3 obtenus à diverses résolutions. Sur celui pris avec spectrographe Star'Ex équipé d'un réseau de 300 t/mm et monté sur un petit astrographe de 60 mm de diamètre seulement, on peut apercevoir des raies H2O+ (une première pour moi), Elles se forment assez loin du noyau et...
by Christian Buil
Wed Jun 08, 2022 12:04 am
Forum: Novae
Topic: Recurrent nova U Sco in eruption
Replies: 30
Views: 10285

Re: Recurrent nova U Sco in eruption

Very fast evolution of U Sco (and a very special spectrum), from Antibes (France), Star'Ex spectrograph on a Celestron 9.25 telescope, the 7.880-06-2022:

Image

Christian Buil