TCP J18292290-1430460 = Nova Sct 2018

Information about outbursts of eruptive stars, Be activity, ...
umberto sollecchia
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by umberto sollecchia »

Bonjour, le profil de la nova observé la nuit dernière 03-07-.2018.
umberto
novasct2018_20180703_860_Umberto Sollecchia.png
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David Boyd
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by David Boyd »

Spectrum last night (3 July) very similar to the night before except H-alpha stronger. The star is also slightly brighter V=10.76 compared to V=10.92 on 2 July.
novasct2018_20180702+20180703_D.Boyd.png
umberto sollecchia
Posts: 242
Joined: Tue Dec 30, 2014 3:25 pm

Re: TCP J18292290-1430460, mag 10 in Sct

Post by umberto sollecchia »

Bonjour à tous, placé le profil de la nova observé hier soir 04-07-2018 et une comparaison avec le jour précédent qui montre la variation de l'absorption du second P-cyg.
Umberto
novasct2018_20180704_841_Umberto Sollecchia.png
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novasct2018 -Comparazione -Umberto Sollecchia.png
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Paolo Berardi
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by Paolo Berardi »

Hi all, the spectrum of 4 July, too. Lhires III and 1200 l/mm grating.

Image

H-alpha emission component raised even more with respect to continuum. Several P-Cyg profiles seems that are forming (Fe II 6417/6456, Si II 6347/6371) at similar velocities (~ -700 Km/s).

H-alpha P-Cyg profile evolved in a more delineated absorption line at about -1500 Km/s. The -700 Km/s component is still present but less obvious. Follows a RV comparison from 1 to 4 July (telluric removed).

Image
Will shoot this every night while at Pinos (6-15Jul18) with LISA and maybe two nights with LhiresIII
Very good James, if the brigtness will not decrease I think you'll catch great spectra also with high resolving powers. Considers that the H-beta region is a bit lower and emission lines are very weak compared to H-alpha (see Lisa/Alpy 600 spectra). But you have a very large telescope!

Paolo
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by Olivier GARDE »

I Paolo,
Great spectra !!!

The weather is bad here in south east of France.... And the magnitude of the Nova is not very bright, so, no more spectra for me at this time.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Christian Buil
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by Christian Buil »

Some view a échelle spectrum of nova Sct 2018 taken last night (6.9/07/2018, 250-mm RC telescope, eShel, ASI1600MM camera):`

Image

Detail of Ha:

Image

Note the complex Na structure (two systems + interstellar):

Image

The green-blue part:

Image


Christian
Paolo Berardi
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Joined: Thu Sep 29, 2011 10:51 pm

Re: TCP J18292290-1430460, mag 10 in Sct

Post by Paolo Berardi »

Thanks Olivier! We also have had bad weather for a long time until the end of June (I would say it was a miracle for the nova!).

Very nice echelle spectrum Christian! Difficult with so high resolution. The same night I observed the h-alpha region with Lhires III and 1200 l/mm grating.

Image

A few changes of h-alpha line except an overall intensity increase against continuum.

The radial velocity plot updated:

Image

Paolo
Olivier GARDE
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Location: Rhône Alpes FRANCE
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by Olivier GARDE »

My last contribution for this Nova and comparison fro my first spectrum taken one week ago. Eshel II spectrograph : 10 x1200s

H alpha

Image

H Beta
Image

Na lines
Image

and the full spectrum (crop at 4750 Å because just noise below)

Image
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
Paul Luckas
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Location: Perth, Western Australia

Re: TCP J18292290-1430460, mag 10 in Sct

Post by Paul Luckas »

A low resolution spectrum, flux calibrated using an average transformed V mag = 10.934 (from photometry acquired at the same time).

Paul
Nova Sct 2018.png
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Paolo Berardi
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Re: TCP J18292290-1430460, mag 10 in Sct

Post by Paolo Berardi »

Hi all, the last spectrum taken on 8 July.

Image

The complex P-cyg absorption of h-alpha line seems to be triple. Indeed, in the 8 July spectrum the -1500 Km/s feature is spread to higher velocities (as if a new adjacent line had developed).

Image

Paolo
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