New transcient, perhaps a nova

Information about outbursts of eruptive stars, Be activity, ...
James Foster
Posts: 439
Joined: Sun Jan 24, 2016 7:14 am

Re: New transcient, perhaps a nova

Post by James Foster »

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
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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 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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Francois Teyssier
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Re: New transcient, perhaps a nova

Post by Francois Teyssier »

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
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

Hi,
NOVA SCT 2017, is full of surprises...
Joan.
Attachments
novasct2017_20170729_0808-1.png
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novasct2017_20170729_0808-2.png
novasct2017_20170729_0808-2.png (28.04 KiB) Viewed 7145 times
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

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

Post by Robin Leadbeater »

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
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
Francois Teyssier
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Re: New transcient, perhaps a nova

Post by Francois Teyssier »

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
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

Hi,
Continues the rise of Hydrogen.
Joan.
Attachments
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novasct2017_20170729_3DIESB.png
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Terry Bohlsen
Posts: 191
Joined: Thu Sep 29, 2011 7:40 am

Re: New transcient, perhaps a nova

Post by Terry Bohlsen »

My effort with this nova. Big changes over 2 weeks.
novascu2017stacked.png
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Terry Bohlsen
Armidale NSW
Australia
Joan Guarro Flo
Posts: 611
Joined: Thu Nov 03, 2011 8:50 pm

Re: New transcient, perhaps a nova

Post by Joan Guarro Flo »

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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