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Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Wed Jul 04, 2018 9:44 am
by umberto sollecchia
Bonjour, le profil de la nova observé la nuit dernière 03-07-.2018.
umberto
- novasct2018_20180703_860_Umberto Sollecchia.png (23.02 KiB) Viewed 15494 times
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Wed Jul 04, 2018 8:17 pm
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.
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Thu Jul 05, 2018 9:09 am
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 (23.43 KiB) Viewed 15455 times
- novasct2018 -Comparazione -Umberto Sollecchia.png (30.97 KiB) Viewed 15439 times
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Thu Jul 05, 2018 4:31 pm
by Paolo Berardi
Hi all, the spectrum of 4 July, too. Lhires III and 1200 l/mm grating.
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).
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
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Fri Jul 06, 2018 11:04 am
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.
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Sat Jul 07, 2018 3:23 pm
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):`
Detail of Ha:
Note the complex Na structure (two systems + interstellar):
The green-blue part:
Christian
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Sat Jul 07, 2018 9:29 pm
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.
A few changes of h-alpha line except an overall intensity increase against continuum.
The radial velocity plot updated:
Paolo
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Sun Jul 08, 2018 10:25 am
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
H Beta
Na lines
and the full spectrum (crop at 4750 Å because just noise below)
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Mon Jul 09, 2018 5:28 am
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 (6 KiB) Viewed 15284 times
Re: TCP J18292290-1430460, mag 10 in Sct
Posted: Mon Jul 09, 2018 5:55 pm
by Paolo Berardi
Hi all, the last spectrum taken on 8 July.
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).
Paolo