New transcient, perhaps a nova

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

Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Fri Sep 29, 2017 3:53 pm

Hi,
This is the evolution zone Hbeta and Fe II, from 2017 07 26 to 2017 09 28.
Cheers, Joan.
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@_NOVASCT2017.gif
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Mon Oct 02, 2017 5:31 pm

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_DataBase/Novae/2017_NovaSct2017.htm:
NovaSct_LC.PNG
NovaSct_LC.PNG (14.28 KiB) Viewed 3129 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 3129 times


novasct2017_Hb.png
novasct2017_Hb.png (57.32 KiB) Viewed 3129 times


novasct2017_FeII5018.png
novasct2017_FeII5018.png (98.79 KiB) Viewed 3129 times


novasct2017_HeI.png
novasct2017_HeI.png (115.71 KiB) Viewed 3129 times


novasct2017_HeI6678.png
novasct2017_HeI6678.png (131.53 KiB) Viewed 3129 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 3129 times


Very impressive!
Keep on the good work on this very peculiar event until the conjonction

François
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Re: New transcient, perhaps a nova

Postby Francisco Campos » Wed Oct 04, 2017 6:16 pm

Outstanding coverage of this "nova". Last news show that the nova is again rebrightening and is going into his third maximum.

Greetings
Fran
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Wed Oct 04, 2017 9:49 pm

Thank you for the information, Fran
A fantastic object!
NovaSct_LC1.PNG
NovaSct_LC1.PNG (13.85 KiB) Viewed 3095 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?
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Wed Oct 04, 2017 9:51 pm

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 3095 times


asassn-17hx -Comparison- Umberto Sollecchia.png
asassn-17hx -Comparison- Umberto Sollecchia.png (34.18 KiB) Viewed 3095 times
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Re: New transcient, perhaps a nova

Postby Francois Teyssier » Wed Oct 04, 2017 10:05 pm

That's great, Umberto!

François
(Currently on R Aqr)
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Fri Oct 06, 2017 3:45 pm

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 3067 times


asassn-17hx - Comparison -Umberto Sollecchia.png
asassn-17hx - Comparison -Umberto Sollecchia.png (33.58 KiB) Viewed 3067 times
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Re: New transcient, perhaps a nova

Postby James Foster » Fri Oct 06, 2017 11:34 pm

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
James Foster
eShel2 (under development-1/3)
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope,
LISA IR/Visual Spectroscope (IR Configured Presently)
Alpy 600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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Re: New transcient, perhaps a nova

Postby umberto sollecchia » Thu Oct 12, 2017 11:24 am

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 3038 times
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Re: New transcient, perhaps a nova

Postby Joan Guarro Flo » Thu Oct 12, 2017 12:07 pm

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.
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novasct2017_20171011_MAX.png
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