New transcient, perhaps a nova
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Re: New transcient, perhaps a nova
I'm joining the party.
R = 540, Flux calibrated using photometry taken at the same time (V = 11.142)
R = 540, Flux calibrated using photometry taken at the same time (V = 11.142)
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Re: New transcient, perhaps a nova
And a spectrum taken last night with a LISA 35u slit and RC400 Astrosib
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: New transcient, perhaps a nova
Bonjour, placé le profil d'observation de la nuit 08/04/2017. Il est calibré en flux absolu avec la photométrie par PaoloBerardi en même temps.Umberto
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Re: New transcient, perhaps a nova
Hi all, the nova brightness appears to be further increased (yesterday I measured V mag = 10.93).
The July 8 spectrum:
The Fe II lines seem to have a more prominent P-cyg profile. The multiplet 42 velocities, measured on the P-Cyg minimum, are slightly decreased (~ 320 Km/s).
The 2d spectrum contaminated by Moon glow (sky not removed). Magnesium triplet & co...
Paolo
The July 8 spectrum:
The Fe II lines seem to have a more prominent P-cyg profile. The multiplet 42 velocities, measured on the P-Cyg minimum, are slightly decreased (~ 320 Km/s).
The 2d spectrum contaminated by Moon glow (sky not removed). Magnesium triplet & co...
Paolo
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Re: New transcient, perhaps a nova
Bonjour à tous, placez le profil d'osservazione della nuit de 10-07-2017.L'étalonnage est flux absolu avec photométrie simultanée de Paolo Berardi.
Umberto
Umberto
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- Profilo nova flux.png (17.95 KiB) Viewed 7562 times
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Re: New transcient, perhaps a nova
Hi all, the nova is still bright, V mag = 10.89 on July 10.9. I observe it with the 1200 l/mm grating (R ~5500) in the H-alpha region. A lines indentification attempt in the lower graph.
H-alpha RV on P-Cyg absorption minimum is about -420 Km/s
The same measure on Si II doublet 6347/6371 (if the identification is correct): -250 Km/s
Paolo
H-alpha RV on P-Cyg absorption minimum is about -420 Km/s
The same measure on Si II doublet 6347/6371 (if the identification is correct): -250 Km/s
Paolo
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Re: New transcient, perhaps a nova
Hello,
very late, but finally yesterday I could take a spectrum of the nova. Only three shots; these last nights we stand hot temperatures and a very wet ambient, so the sky is often covered by low and persistent clouds. For this spectrum I used HD 179761 as comparison star.
Photometrycally the nova is now at his maximum brightness, according to AAVSO observations. Maybe Nova Sct 2017 is a slow nova (Nb)? Definitively it seems quite different if we compare it with Nova Del 2013.
Greetings
Fran
very late, but finally yesterday I could take a spectrum of the nova. Only three shots; these last nights we stand hot temperatures and a very wet ambient, so the sky is often covered by low and persistent clouds. For this spectrum I used HD 179761 as comparison star.
Photometrycally the nova is now at his maximum brightness, according to AAVSO observations. Maybe Nova Sct 2017 is a slow nova (Nb)? Definitively it seems quite different if we compare it with Nova Del 2013.
Greetings
Fran
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Re: New transcient, perhaps a nova
Yes, it is very slow. Interesting
Very nice spectra. Congratulations to all
Francois
Very nice spectra. Congratulations to all
Francois
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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Re: New transcient, perhaps a nova
Bonjour à tous, placez le profil d'osservazione della nuit de 12-07-2017 et 13-07-2017.L'ampleur de la nova est encore augmentée comme indiqué par la courbe AAVSO.
Umberto.
Umberto.
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Re: New transcient, perhaps a nova
Molto interessante, buon lavoro Umberto !
Now that it rises in magnitude, I will try to observe it with an echelle.
Un forte abbraccio, Joan.
Now that it rises in magnitude, I will try to observe it with an echelle.
Un forte abbraccio, Joan.