New transcient, perhaps a nova
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Re: New transcient, perhaps a nova
Bonjour, placez le profil spectral de la journée 26-08-2017, calibré en Flux absolu.
Last edited by umberto sollecchia on Thu Aug 31, 2017 3:03 pm, edited 1 time in total.
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Re: New transcient, perhaps a nova
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
Umberto
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Re: New transcient, perhaps a nova
Excellent survey of a very interesting and peculiar nova
The light curve (AAVSO V) and ARAS Spectra
Now a plateau at mag V ~ 11
All the best,
François Teyssier
The light curve (AAVSO V) and ARAS Spectra
Now a plateau at mag V ~ 11
All the best,
François Teyssier
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: New transcient, perhaps a nova
Hi,
Although ns2107 brightness goes down. Over the last 24 hours it has increased its emission
Cheers, Joan.
Although ns2107 brightness goes down. Over the last 24 hours it has increased its emission
Cheers, Joan.
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- novasct2017_DAYS 0901-0902Ha.png (31.08 KiB) Viewed 7449 times
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Re: New transcient, perhaps a nova
Bonne journée pour tous, le profil spectral du jour 01-09-2017.Umberto
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Re: New transcient, perhaps a nova
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
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Re: New transcient, perhaps a nova
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.
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):
The comparison with Sep 4 spectrum:
Paolo
The actual H-beta region spectrum exhibits lines (hydrogen and iron - helium?) with a complex P-Cyg profile.
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):
The comparison with Sep 4 spectrum:
Paolo
Last edited by Paolo Berardi on Fri Sep 08, 2017 11:06 pm, edited 1 time in total.
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Re: New transcient, perhaps a nova
Bonsoir, voici le profil de faible résolution pris en même temps que celui de Paolo Berardi.Umberto
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Re: New transcient, perhaps a nova
Hi,
This is a complement of Paolo and Umberto's explanations. The Hidrogen emission loses strength.
Joan.
This is a complement of Paolo and Umberto's explanations. The Hidrogen emission loses strength.
Joan.
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Re: New transcient, perhaps a nova
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..
Tim
Tim