New transcient, perhaps a nova

[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:



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

[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 (10.21 KiB) Viewed 8218 times

[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]

Hi,
NOVA SCT 2017, is full of surprises...
Joan.

[umberto sollecchia]

Caramba, quelle belle surprise Joan !....- Umberto

[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

[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 (30.1 KiB) Viewed 8140 times

All the best,

François

[Joan Guarro Flo]

Hi,
Continues the rise of Hydrogen.
Joan.

[Terry Bohlsen]

My effort with this nova. Big changes over 2 weeks.

novascu2017stacked.png (48.36 KiB) Viewed 8089 times

[Joan Guarro Flo]

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