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Re: New transcient, perhaps a nova

Posted: Fri Sep 29, 2017 3:53 pm
by Joan Guarro Flo
Hi,
This is the evolution zone Hbeta and Fe II, from 2017 07 26 to 2017 09 28.
Cheers, Joan.

Re: New transcient, perhaps a nova

Posted: Mon Oct 02, 2017 5:31 pm
by Francois Teyssier
Very good coverage and nive animation, Joan!

The evolution of the "nova" is very impressive and atypical

Update of the light curve with the second rise from ARAS data base http://www.astrosurf.com/aras/Aras_Data ... ct2017.htm:
NovaSct_LC.PNG
NovaSct_LC.PNG (14.28 KiB) Viewed 7078 times
Evolution of some lines during the second decline:

H alpha. At the second maximum, the emission is very weak
This is the typical behavior of the lines during an oscillation, hightlighted by Mac Lauglin: during an oscillation the spectrum tends to regain the aspect it had at the same luminosity

novasct2017_20170915_Ha.png
novasct2017_20170915_Ha.png (50.27 KiB) Viewed 7078 times
novasct2017_Hb.png
novasct2017_Hb.png (57.32 KiB) Viewed 7078 times
novasct2017_FeII5018.png
novasct2017_FeII5018.png (98.79 KiB) Viewed 7078 times
novasct2017_HeI.png
novasct2017_HeI.png (115.71 KiB) Viewed 7078 times
novasct2017_HeI6678.png
novasct2017_HeI6678.png (131.53 KiB) Viewed 7078 times
H beta profile from the mast spectrum obtained by Paolo:
Interesting to see the similarity between the two main absorptions vr ~-430 and +460 km/s
asassn-17hx_20170930_732_Hb.png
asassn-17hx_20170930_732_Hb.png (17.91 KiB) Viewed 7078 times
Very impressive!
Keep on the good work on this very peculiar event until the conjonction

François

Re: New transcient, perhaps a nova

Posted: Wed Oct 04, 2017 6:16 pm
by Francisco Campos
Outstanding coverage of this "nova". Last news show that the nova is again rebrightening and is going into his third maximum.

Greetings
Fran

Re: New transcient, perhaps a nova

Posted: Wed Oct 04, 2017 9:49 pm
by Francois Teyssier
Thank you for the information, Fran
A fantastic object!
NovaSct_LC1.PNG
NovaSct_LC1.PNG (13.85 KiB) Viewed 7044 times
Uptade of the lightcurve and last spectra (Terry, Joan, Paolo, Umberto, Fran)

All the best,

François

PS: I can't access to the photometry of this nova from VStar. Any idea?

Re: New transcient, perhaps a nova

Posted: Wed Oct 04, 2017 9:51 pm
by umberto sollecchia
Bonsoir, la nouvelle a de nouveau gagné 1 grandeur. Afin d'évaluer la variation significative, placer le profil de ce soir et une comparaison avec le jour 02-10-2017.
Umberto
asassn-17hx_20171004_773_Umberto Sollecchia.png
asassn-17hx_20171004_773_Umberto Sollecchia.png (24.05 KiB) Viewed 7044 times
asassn-17hx -Comparison- Umberto Sollecchia.png
asassn-17hx -Comparison- Umberto Sollecchia.png (34.18 KiB) Viewed 7044 times

Re: New transcient, perhaps a nova

Posted: Wed Oct 04, 2017 10:05 pm
by Francois Teyssier
That's great, Umberto!

François
(Currently on R Aqr)

Re: New transcient, perhaps a nova

Posted: Fri Oct 06, 2017 3:45 pm
by umberto sollecchia
Bonsoir du tout, la danse de la nouvelle continue. Place le profil du jour 05-10-2017 et une comparaison avec le jour 04-10-2017.
Umberto
asassn-17hx_20171005_740_Umberto Sollecchia.png
asassn-17hx_20171005_740_Umberto Sollecchia.png (23.49 KiB) Viewed 7016 times
asassn-17hx - Comparison -Umberto Sollecchia.png
asassn-17hx - Comparison -Umberto Sollecchia.png (33.58 KiB) Viewed 7016 times

Re: New transcient, perhaps a nova

Posted: Fri Oct 06, 2017 11:34 pm
by James Foster
Here is my last spectra of Asassn-17hx from my high altitude site:
Image
Will try to shoot this with the LihiresIII if I can master it before this nova gets too low.
Probably will not shoot it again from dark sky site until its too low to shoot (Nov17 new moon).

James

Re: New transcient, perhaps a nova

Posted: Thu Oct 12, 2017 11:24 am
by umberto sollecchia
onne journée à tous, placez le profil de la nouvelle observé le 11-10-2017.
Umberto
asassn-17hx_20171011_744_Umberto Sollecchia.png
asassn-17hx_20171011_744_Umberto Sollecchia.png (21.81 KiB) Viewed 6987 times

Re: New transcient, perhaps a nova

Posted: Thu Oct 12, 2017 12:07 pm
by Joan Guarro Flo
Hi,

As it is seen in the graph of the Umberto. Halpha of the New Sct 2017, has been back in the maximum issue

Regards, Joan.