New transcient, perhaps a nova

Information about outbursts of eruptive stars, Be activity, ...

Re: New transcient, perhaps a nova

Postby Paul Luckas » Sat Jul 08, 2017 3:01 am

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
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Re: New transcient, perhaps a nova

Postby Olivier GARDE » Sat Jul 08, 2017 12:04 pm

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
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Sun Jul 09, 2017 5:28 pm

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 3602 times
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Re: New transcient, perhaps a nova

Postby Paolo Berardi » Sun Jul 09, 2017 6:29 pm

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
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Tue Jul 11, 2017 2:13 pm

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
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Re: New transcient, perhaps a nova

Postby Paolo Berardi » Tue Jul 11, 2017 5:27 pm

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

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Re: New transcient, perhaps a nova

Postby Francisco Campos » Wed Jul 12, 2017 9:16 pm

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 3544 times


_novasct2017_20170711_867_FPC amp.png
_novasct2017_20170711_867_FPC amp.png (8.52 KiB) Viewed 3544 times


Greetings
Fran
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Thu Jul 13, 2017 12:41 am

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

Francois
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Fri Jul 14, 2017 6:50 am

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 3508 times


Profilo Nova.png
Profilo Nova.png (6.54 KiB) Viewed 3508 times


AAVSO.png
AAVSO.png (10.89 KiB) Viewed 3508 times
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Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Fri Jul 14, 2017 8:26 am

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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