New transcient, perhaps a nova

Information about outbursts of eruptive stars, Be activity, ...
Tim Lester
Posts: 168
Joined: Fri Apr 04, 2014 6:31 pm
Location: Arnprior Ontario

Re: New transcient, perhaps a nova

Post by Tim Lester »

Was able to get spectra the last two nights (29th and 30th) with my new echelle. Halpha still dropping.
novasct2017_20170730_072_Halpha_tlester.png
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But not much change at Hbeta.
novasct2017_20170730_072_Hbeta_tlester.png
novasct2017_20170730_072_Hbeta_tlester.png (43.02 KiB) Viewed 6763 times
Tim
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,

Comparing three nights.

Joan.
Attachments
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novasct2017_20170726_847_J. Guarro2.png
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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 d'osservazione dans la nuit du 30/07/2017.
Profilo nova flux.png
Profilo nova flux.png (12.59 KiB) Viewed 6750 times
Umberto
Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: New transcient, perhaps a nova

Post by Paolo Berardi »

Great observations Joan, Umberto!

Huge variations again in the yesterday spectrum (July 30). A lot of absorption lines are emphasised. While for the H-beta line there has been a slight change, Fe II lines (but also many other lines) have greatly increased the velocity (blueshifted P-Cyg absorption and broaded emission component).

Image

Measurements are difficult due to the presence of so many absoption lines that, I think, distort the P-Cygni profiles.

Image

Image

The 2d spectrum comparison:

Image

Average V magnitude for yesterday: 8.67 (July 30 ~21 UT).

Paolo
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: New transcient, perhaps a nova

Post by Francois Teyssier »

Congratulations for the excellent monitoring

It seems that the nova has reached its maximum
Sct2007.PNG
Sct2007.PNG (5.34 KiB) Viewed 6722 times
The database is updated
Please, check and say me

All the best,

François
(Back home)
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: New transcient, perhaps a nova

Post by umberto sollecchia »

Salut, j'ai fait une animation avec des spectres pris jusqu'à présent, calibré flux absolu par photométrie de Paolo.
Il souligne que l'animation est interpolée, pour sa réalisation,j'ai utilisé 12 observations qui couvrent la plage où la nova atteint la luminosité maximale.
ASASSN-17hx.gif
ASASSN-17hx.gif (946.71 KiB) Viewed 6719 times
Salutations
Umberto
Francois Teyssier
Posts: 1520
Joined: Fri Sep 23, 2011 1:01 pm
Location: Rouen
Contact:

Re: New transcient, perhaps a nova

Post by Francois Teyssier »

Bravo Umberto, autant pour le suivi que pour la présentation de l'évolution du spectre.
Bonne continuation pour le déclin vers la phase nébulaire

François
Paul Luckas
Posts: 101
Joined: Tue Jun 24, 2014 5:08 pm
Location: Perth, Western Australia

Re: New transcient, perhaps a nova

Post by Paul Luckas »

I've not had much chance to take spectra due to rain, but finally managed some spectrophotometry of the now changing and brightening ASASSN-17hx last night. A comparison with my last spectrum of 7th July is also attached.

Paul
ASASSN-17hx.png
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ASASSN-17hx_comp.png
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Paolo Berardi
Posts: 578
Joined: Thu Sep 29, 2011 10:51 pm

Re: New transcient, perhaps a nova

Post by Paolo Berardi »

Hi all, my last observations with Lhires III and 1200 l/mm grating.

July 31, H-alpha region, tellurics removed:

Image

Aug 1, H-beta and Fe II (42):

Image

In the last few days, metal lines increased a lot the P-Cyg RV (not the
Balmer lines). Many P-Cyg profile absorptions are now double (two minima).

Paolo
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,

The H alpha of NOVA Sct 2017, is ascending again, I hope that does it hard.. The minimun, ( at de moment ), is registereg by Tim Lester, on the night 2017 07 30.

Congratulations to all, Umberto, si sta facendo un grande lavoro.

Joan.
Attachments
novasct2017_20170726_847_J. Guarro1.png
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novasct2017_20170726_847_J. Guarro2.png
novasct2017_20170726_847_J. Guarro2.png (37.12 KiB) Viewed 6684 times
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