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Re: SS Cygni in outburst
Posted: Sun Jul 03, 2016 3:25 pm
by Joan Guarro Flo
Ciao Umberto, Hi Vincent :
It's a good job !! What is the star that you use for reference?
Un forte abbraccio, Joan.
Re: SS Cygni in outburst
Posted: Mon Jul 04, 2016 10:33 am
by umberto sollecchia
Bonjour à tous.
Ciao Joan, pour référence j'utilisé l'étoile HD 192640. Il est miles 'une variable, mais à ce moment est très stable.
Je fis une nouvelle réduction des données , pour tous les commentaires que j'ai posté, en utilisant comme référence un autres miles et précisément HD 214994, mais tous les profil ils sont identiques.
Placez le profil spectral de la observation de lanuit dernière et la comparaison avec le jour 02/07/2016
Même ce processus, je l'ai fait avec HD 192640 et HD 214994 miles.
Même ce sprint continu a la même tendance.
Un fuerte abrazo.
Umberto
- Profilo sscyg.png (6.31 KiB) Viewed 9885 times
- Comparazione.png (7.81 KiB) Viewed 9885 times
salutations à tous.
Umberto
Re: SS Cygni in outburst
Posted: Mon Jul 04, 2016 1:27 pm
by Vincent Bouttard
Really nice job, Umberto ! You have the whole decrease of the dwarf nova.
I think that I will do the next eruptive phase in 60 days. This is a fascinating star.
Joan,
According to François Teyssier 's recommendation, I've taken HD211211 (A5V) as reference star. I remember that I saw this reference star in the Eruptive Stars Information Letter.
Vincent
Re: SS Cygni in outburst
Posted: Mon Jul 04, 2016 5:25 pm
by Francois Teyssier
Yes a very nice series!
Congratulations, Umberto
You could convert the spectra in flux, using AAVSO data with ISIS tool
- Flux.PNG (4.26 KiB) Viewed 9871 times
François
Re: SS Cygni in outburst
Posted: Mon Jul 04, 2016 10:00 pm
by umberto sollecchia
Merci à tous pour appréciation du travail.
Vincent, le prochain événement, semble avoir prévu pour le mois d'Août.
Cordialement.
Umberto
Re: SS Cygni in outburst
Posted: Tue Jul 12, 2016 4:47 pm
by Joan Guarro Flo
To everybody :
This is the graph of the star SS Cygni, on 2016 07 09.
It is a good object to monitoring ...
Cheers, Joan.
Re: SS Cygni in outburst
Posted: Tue Jul 12, 2016 5:04 pm
by Francois Teyssier
Vincent, le prochain événement, semble avoir prévu pour le mois d'Août.
The mean interval between outbursts is about 50 days, but not constant (about 20 to 80 days)
- SSCyg.PNG (28.59 KiB) Viewed 9804 times
See, for instance :
http://adsabs.harvard.edu/abs/1992ApJ...401..642C
Note also that there are short and long outburts and that he spectral evolution differs from one type to another
The current knowledge is : outburt outside-inside disk and inside-outside
Bonnes observations
François
Re: SS Cygni in outburst
Posted: Thu Jul 14, 2016 12:54 pm
by umberto sollecchia
Felicidades Joan, excelente perfil. Pablo y yo esperamos tanto que venga a visitarnos de nuevo en nuestra bella Italia.
Un fuerte abrazo.Umberto
Re: SS Cygni in outburst
Posted: Thu Jul 14, 2016 12:59 pm
by umberto sollecchia
Francois, je vous remercie beaucoup d'informations.
Salutations
Umberto
Re: SS Cygni in outburst
Posted: Sat Jul 16, 2016 3:51 pm
by Joan Guarro Flo
To all,
It is a new graph of the SS Cyg. We expect a new eruption.
Regards, Joan.