New transcient, perhaps a nova

Information about outbursts of eruptive stars, Be activity, ...
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Bonjour, placez le profil spectral de la journée 26-08-2017, calibré en Flux absolu.
Profolo nova flux.png
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Last edited by umberto sollecchia on Thu Aug 31, 2017 3:03 pm, edited 1 time in total.
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Bonsoir du tout, le profil de l'observation sur la nuit du 29-08-2017.Je joint également une comparaison entre le 26-08-2017 et le 29-08-2017 où il y a une légère hausse du H-alpha le jour 29-08-2017.
Umberto
Profilo nova flux.png
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Compararison crop.jpg
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Francois Teyssier
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Re: New transcient, perhaps a nova

Post by Francois Teyssier »

Excellent survey of a very interesting and peculiar nova

The light curve (AAVSO V) and ARAS Spectra
Now a plateau at mag V ~ 11
NovaSct2017.PNG
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All the best,

François Teyssier
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

Hi,
Although ns2107 brightness goes down. Over the last 24 hours it has increased its emission
Cheers, Joan.
Attachments
novasct2017_DAYS 0901-0902Ha.png
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novasct2017_DAYS 0901-0902Fe.png
novasct2017_DAYS 0901-0902Fe.png (65.21 KiB) Viewed 7449 times
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Bonne journée pour tous, le profil spectral du jour 01-09-2017.Umberto
Attachments
Profilo nova flux.png
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umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Bonjour, le profil de la nuit dernière et une comparaison dans la région H-alpha avec le jour 01-09-2017. L'hydrogène monte encore. Umberto
Profilo nova flux.png
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Comaparazione H-alfa.png
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Paolo Berardi
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Joined: Thu Sep 29, 2011 10:51 pm

Re: New transcient, perhaps a nova

Post by Paolo Berardi »

Hi all, the nova is undergoing a strong rebrightening. During my last observation, Sep 4, was shining at V mag 10.86 while this evening (Sep 8, ~ 19UT) V mag is 9.76.

The actual H-beta region spectrum exhibits lines (hydrogen and iron - helium?) with a complex P-Cyg profile.

Image

On a low-res spectrum used for flux calibration (by Umberto, same night), I can see P-Cyg profiles on all the Balmer, helium and metals emission lines.

Heliocentric radial velocity of H-beta line (two main velocities, ~-500 and -1000 Km/s):

Image

The comparison with Sep 4 spectrum:

Image

Paolo
Last edited by Paolo Berardi on Fri Sep 08, 2017 11:06 pm, edited 1 time in total.
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Bonsoir, voici le profil de faible résolution pris en même temps que celui de Paolo Berardi.Umberto
asassn-17hx_20170908_780_Umberto Sollecchia flux.jpg
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asassn-17hx_20170908_780_2.png
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Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

Hi,
This is a complement of Paolo and Umberto's explanations. The Hidrogen emission loses strength.
Joan.
Attachments
novasct2017_20170908_J. Guarro5.png
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novasct2017_20170908_J. Guarro5B.png
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Tim Lester
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Joined: Fri Apr 04, 2014 6:31 pm
Location: Arnprior Ontario

Re: New transcient, perhaps a nova

Post by Tim Lester »

Here is nova sct on the 10th captured with my echelle spectrograph at R = 12000. It is still brightening (V mag = 9.5 on AAVSO) but it is low in the sky and difficult to get good S/N at the blue end..
novasct2017_20170910_014_tlester_1.png
novasct2017_20170910_014_tlester_2.png
novasct2017_20170910_014_tlester_3.png
novasct2017_20170910_014_tlester_3.png (24.85 KiB) Viewed 7318 times
Tim
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