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Re: New transcient, perhaps a nova

PostPosted: Sat Jul 08, 2017 3:01 am
by Paul Luckas
I'm joining the party.

R = 540, Flux calibrated using photometry taken at the same time (V = 11.142)

asassn-17hx_20170707_510_Paul Luckas1.png


asassn-17hx_20170707_510_Paul Luckas.png

Re: New transcient, perhaps a nova

PostPosted: Sat Jul 08, 2017 12:04 pm
by Olivier GARDE
And a spectrum taken last night with a LISA 35u slit and RC400 Astrosib
Image

Re: New transcient, perhaps a nova

PostPosted: Sun Jul 09, 2017 5:28 pm
by umberto sollecchia
Bonjour, placé le profil d'observation de la nuit 08/04/2017. Il est calibré en flux absolu avec la photométrie par PaoloBerardi en même temps.Umberto

Profilo nova flux 009-07-2017.png
Profilo nova flux 009-07-2017.png (10.45 KiB) Viewed 3581 times

Re: New transcient, perhaps a nova

PostPosted: Sun Jul 09, 2017 6:29 pm
by Paolo Berardi
Hi all, the nova brightness appears to be further increased (yesterday I measured V mag = 10.93).

The July 8 spectrum:

Image

The Fe II lines seem to have a more prominent P-cyg profile. The multiplet 42 velocities, measured on the P-Cyg minimum, are slightly decreased (~ 320 Km/s).

The 2d spectrum contaminated by Moon glow (sky not removed). Magnesium triplet & co...

Image

Paolo

Re: New transcient, perhaps a nova

PostPosted: Tue Jul 11, 2017 2:13 pm
by umberto sollecchia
Bonjour à tous, placez le profil d'osservazione della nuit de 10-07-2017.L'étalonnage est flux absolu avec photométrie simultanée de Paolo Berardi.
Umberto

Re: New transcient, perhaps a nova

PostPosted: Tue Jul 11, 2017 5:27 pm
by Paolo Berardi
Hi all, the nova is still bright, V mag = 10.89 on July 10.9. I observe it with the 1200 l/mm grating (R ~5500) in the H-alpha region. A lines indentification attempt in the lower graph.

Image

H-alpha RV on P-Cyg absorption minimum is about -420 Km/s

Image

The same measure on Si II doublet 6347/6371 (if the identification is correct): -250 Km/s

Image

Paolo

Re: New transcient, perhaps a nova

PostPosted: Wed Jul 12, 2017 9:16 pm
by Francisco Campos
Hello,

very late, but finally yesterday I could take a spectrum of the nova. Only three shots; these last nights we stand hot temperatures and a very wet ambient, so the sky is often covered by low and persistent clouds. For this spectrum I used HD 179761 as comparison star.

Photometrycally the nova is now at his maximum brightness, according to AAVSO observations. Maybe Nova Sct 2017 is a slow nova (Nb)? Definitively it seems quite different if we compare it with Nova Del 2013.

_novasct2017_20170711_867_FPC.png
_novasct2017_20170711_867_FPC.png (12.67 KiB) Viewed 3523 times


_novasct2017_20170711_867_FPC amp.png
_novasct2017_20170711_867_FPC amp.png (8.52 KiB) Viewed 3523 times


Greetings
Fran

Re: New transcient, perhaps a nova

PostPosted: Thu Jul 13, 2017 12:41 am
by Francois Teyssier
Yes, it is very slow. Interesting
Very nice spectra. Congratulations to all

Francois

Re: New transcient, perhaps a nova

PostPosted: Fri Jul 14, 2017 6:50 am
by umberto sollecchia
Bonjour à tous, placez le profil d'osservazione della nuit de 12-07-2017 et 13-07-2017.L'ampleur de la nova est encore augmentée comme indiqué par la courbe AAVSO.
Umberto.

Profilo nova.png
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Profilo Nova.png
Profilo Nova.png (6.54 KiB) Viewed 3487 times


AAVSO.png
AAVSO.png (10.89 KiB) Viewed 3487 times

Re: New transcient, perhaps a nova

PostPosted: Fri Jul 14, 2017 8:26 am
by Joan Guarro Flo
Molto interessante, buon lavoro Umberto !

Now that it rises in magnitude, I will try to observe it with an echelle.

Un forte abbraccio, Joan.