TCP J18292290-1430460 = Nova Sct 2018

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Re: TCP J18292290-1430460, mag 10 in Sct

Postby umberto sollecchia » Wed Jul 04, 2018 9:44 am

Bonjour, le profil de la nova observé la nuit dernière 03-07-.2018.
umberto

novasct2018_20180703_860_Umberto Sollecchia.png
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby David Boyd » Wed Jul 04, 2018 8:17 pm

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby umberto sollecchia » Thu Jul 05, 2018 9:09 am

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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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Thu Jul 05, 2018 4:31 pm

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Olivier GARDE » Fri Jul 06, 2018 11:04 am

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Christian Buil » Sat Jul 07, 2018 3:23 pm

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


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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Sat Jul 07, 2018 9:29 pm

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Olivier GARDE » Sun Jul 08, 2018 10:25 am

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
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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paul Luckas » Mon Jul 09, 2018 5:28 am

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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Re: TCP J18292290-1430460, mag 10 in Sct

Postby Paolo Berardi » Mon Jul 09, 2018 5:55 pm

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

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