New transcient, perhaps a nova

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

Re: New transcient, perhaps a nova

Postby James Foster » Tue Aug 08, 2017 6:48 am

I'm late to the party on the Asassn-17hx, but while at my dark sky, high altitude site I got a LISA spectra on 26 July 2017:

Image

All element line identifications are tentative. I'll get another shot at this in two weeks from the same site......maybe
I'll have my LhiresIII up and running by then!

James
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Tue Aug 08, 2017 7:02 am

Bonjour à tous, placez le profil de nova observé dans la nuit du 03/08/2017.Peut-être la nova, a décidé d'aller à la retraite.
Umberto

Profilo nova flux.png
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Tue Aug 08, 2017 10:17 am

Nice Spectrum, Umberto. Decline toward nebular phase.

James: correct, unless He I. The lines are Fe II, multiplet 42
He I will appear latter when the recessing photosphere will be hotter and so hot enough to ionize He

All the best,

François
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Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Wed Aug 09, 2017 7:25 pm

Hi,
NOVA SCT 2017, is full of surprises...
Joan.
Attachments
novasct2017_20170729_0808-1.png
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novasct2017_20170729_0808-2.png
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Thu Aug 10, 2017 7:15 am

Caramba, quelle belle surprise Joan !....- Umberto
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Re: New transcient, perhaps a nova

Postby Robin Leadbeater » Thu Aug 10, 2017 1:24 pm

Wow ! Even allowing for the change in continuum flux between the two dates (~1 mag at R, AAVSO data) that is a big change

Robin
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Thu Aug 10, 2017 4:10 pm

Excellent monitoring
Congratulations to all the observers

The maximum (~30-07-2017) Echelle spectra obtained by Tim, Joan & Olivier: almost no changes during two days, from 28 th to 30th

NovaSct2017_Hb.PNG
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All the best,

François
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Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Fri Aug 11, 2017 8:52 am

Hi,
Continues the rise of Hydrogen.
Joan.
Attachments
novasct2017_20170729_3DIESA.png
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novasct2017_20170729_3DIESB.png
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Re: New transcient, perhaps a nova

Postby Terry Bohlsen » Fri Aug 11, 2017 12:23 pm

My effort with this nova. Big changes over 2 weeks.
novascu2017stacked.png
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Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Sat Aug 12, 2017 8:18 am

Hi,
NOVASCT2017 has moderated its growth in the Halpha and has decreased to its emission in the Hbeta.
Regards, Joan.
Attachments
novasct2017_20170729_4DIESA.png
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novasct2017_20170729_4DIESB.png
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