New transcient, perhaps a nova

Information about outbursts of eruptive stars, Be activity, ...
Paul Luckas
Posts: 101
Joined: Tue Jun 24, 2014 5:08 pm
Location: Perth, Western Australia

Re: New transcient, perhaps a nova

Post by Paul Luckas »

I'm joining the party.

R = 540, Flux calibrated using photometry taken at the same time (V = 11.142)
asassn-17hx_20170707_510_Paul Luckas1.png
asassn-17hx_20170707_510_Paul Luckas.png
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: New transcient, perhaps a nova

Post by Olivier GARDE »

And a spectrum taken last night with a LISA 35u slit and RC400 Astrosib
Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

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
Profilo nova flux 009-07-2017.png
Profilo nova flux 009-07-2017.png (10.45 KiB) Viewed 7323 times
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: New transcient, perhaps a nova

Post by Paolo Berardi »

Hi all, the nova brightness appears to be further increased (yesterday I measured V mag = 10.93).

The July 8 spectrum:

Image

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...

Image

Paolo
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

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
Attachments
Profilo nova flux.png
Profilo nova flux.png (17.95 KiB) Viewed 7302 times
Paolo Berardi
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Re: New transcient, perhaps a nova

Post by Paolo Berardi »

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.

Image

H-alpha RV on P-Cyg absorption minimum is about -420 Km/s

Image

The same measure on Si II doublet 6347/6371 (if the identification is correct): -250 Km/s

Image

Paolo
Francisco Campos
Posts: 88
Joined: Sun Nov 29, 2015 10:13 pm

Re: New transcient, perhaps a nova

Post by Francisco Campos »

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.
_novasct2017_20170711_867_FPC.png
_novasct2017_20170711_867_FPC.png (12.67 KiB) Viewed 7265 times
_novasct2017_20170711_867_FPC amp.png
_novasct2017_20170711_867_FPC amp.png (8.52 KiB) Viewed 7265 times
Greetings
Fran
Francois Teyssier
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Location: Rouen
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Re: New transcient, perhaps a nova

Post by Francois Teyssier »

Yes, it is very slow. Interesting
Very nice spectra. Congratulations to all

Francois
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

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.
Profilo nova.png
Profilo nova.png (6.4 KiB) Viewed 7229 times
Profilo Nova.png
Profilo Nova.png (6.54 KiB) Viewed 7229 times
AAVSO.png
AAVSO.png (10.89 KiB) Viewed 7229 times
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

Molto interessante, buon lavoro Umberto !

Now that it rises in magnitude, I will try to observe it with an echelle.

Un forte abbraccio, Joan.
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