20 octobre 2012
Possible end of outbust of HD175511

11 octobre 2012
WR134, 135, 137 IAC80 Teide Campaign
"A brief status update: We now have 19 amateur and 1 professional campaign members who would go to Teide (20 overall from Germany, France, Poland, Danmark, Australia, Spain, Portugal). Because we have two teams of four members and one team of three we still need more observers. Presently we can establish only 7 teams at best. " Thomas Everberg
I formed a small group of 3 and half observers for two weeks at IAC80. Participants are Pierre Dubreuil, Alain Lopez and Benjamin Mauclaire (only for a week). Two... [Lire la suite]
22 septembre 2012
HD57682, final publication in MNRAS
This was a short term campaign, about three months during spring 2011, but a lot of discovers.
links to the ARAS amateur survey (by Benjamin Mauclaire)
Behavior of the h alpha line of this very rare Oe magnetic star needs a lot of physics to be explained. The final publication in the Monthly Notices of the Royal Astronomy Society is a long and heavy paper on the state of art of MHD applied to circumstellar environment. Well not really a light digest for sleeping time.
Thank to J. H. Grunhut and all for allowing us to be... [Lire la suite]
22 septembre 2012
VV Ser, Herbig Be

09 septembre 2012
instrumentation DeniSe, observatoire de Fontcaude

05 septembre 2012
WETLR Spectro 2012
Avec la volonté de former de plus en plus d'amateurs locaux à la spectroscopie, la société astronomique de Montpellier organise un week end d'initiation à l'observatoire Malibert du club de Béziers http://www.lamachinepneumatique.fr/index.php?option=com_content&view=article&id=3&Itemid=2
Autour d'instruments et de spectrographes à la portée des amateurs, star analyzer, LhiresIII et Lisa, nous discuterons de fondamentaux, de techniques instrumentales, de réduction et interprétation des données. Enfin l'accent sera... [Lire la suite]
09 août 2012
V425 cyg is in outburst
V425 Cyg, mV10.6 is in outburst. This star has a strange spectral classification. It is known as a Be star, B2 npe, but could be of another nature maybe a rare A type supergiant.
Here is what is saying Anatoly Miroshnichenko:
"There is another unstudied object called V425 Cyg. It is listed inBeSS, but no spectra have been obtained for it. In the literature itwas classified as an A2-supergiants and a B2-dwarf. It is a 10-10.2visual magnitude star. An echelle spectrum of it may either addinformation to BeSS or verify its... [Lire la suite]
14 juillet 2012
What is a L200 spectrograph ?

11 juillet 2012
First echelle spectra of AZ Cas
