PNV J20233073+2046041 mag 6.8

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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Tue Aug 20, 2013 7:47 pm

I confirm Terry's observation.
Very strong Halpha line in emission (no more absorption line)
Very strong HBeta

And some others lines between H Alpha and HBeta.
I reduce my exposure time from 200s down to 180s.
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Re: PNV J20233073+2046041 mag 6.8

Postby Francois Teyssier » Tue Aug 20, 2013 8:22 pm

H alpha saturée à 30 secondes de poses
Je dois réduire à 20 secondes.
Il va bientôt falloir diaphragmer ;)
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Re: PNV J20233073+2046041 mag 6.8

Postby Francois Teyssier » Tue Aug 20, 2013 8:57 pm

Impressionnat cette augmentation de l'intensité relative de H alpha
Le spectre de cette nuit
_novadel2013_20130820_848_fteyssier.png
_novadel2013_20130820_848_fteyssier.png (5.06 KiB) Viewed 451 times



Comparison with Terry's spectrum acquired only 8 hours before

NDel.png
NDel.png (6.37 KiB) Viewed 451 times



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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier Thizy » Tue Aug 20, 2013 9:27 pm

Bonjour,


la petite lulu de 85mm est en route sur la nova. Effectivement, j'ai du réduire le temps de pose de 120sec à 90s pour ne pas saturer; et Halpha est vraiment en forte augmentation. Voici le graphe des 7 spectres (un par nuite depuis le 14-août); le spectre du haut est le dernier pris il y a quelques minutes:

Little 85mm refractor is active on the nova at the moment. I had to reduce exposure fro 120s last nigth to 90s now to avoid saturating. Halpha is growing. Here is the graph with 7 spectra (one per night since aug-14); top spectrum is the lat one from few minutes ago:



nova.jpg
nova.jpg (150.56 KiB) Viewed 443 times



and a pic of the equipment by night, under the Moonlight:

web_IMG_7177 TV85-Alpy by night.jpg
web_IMG_7177 TV85-Alpy by night.jpg (119.3 KiB) Viewed 425 times



Cordialement,
Olivier Thizy
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Tue Aug 20, 2013 10:13 pm

J'ai lancé des acquisitions avec l'eshel depuis le début de la nuit jusqu'à la fin et je viens de faire le retournement de monture.
Donc demain matin, j'aurais environs 140 images de 180s chacune, de quoi faire une belle animation de tout les ordres....
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier Thizy » Tue Aug 20, 2013 10:18 pm

Hello,


here are some more information from Steve Shore on the nova:

We have a gamma-emitter! The result was found this morning and the
Fermi people pushed the ATel up. It's about 3-4 times fainter than
V959 Mon but that could change, it's just the start. We have two more
days of pointed observations so this will be updated. These spectra
[ndlr: from the group] are all spectacular.

It is now vitally important that anyone who can cover the 4200-4300 and
3800-4000 A region do so. High or low resolution (well, not too low).
The CN -- if it appears -- will come around in this next week.


The Na I velocities now seem to agree with the hydrogen from the
interstellar medium (attached) so we can estimate the minimum distance
(likely 3 kpc) and maximum (likely 4 kpc). It's not in the plane but
not too far above it, and the UBV luminosity is about the same as the
maximum we would expect for a nova at this stage.

The group of lines at the right of Hbeta are the Fe II lines at 4921, 5018,
5269 and a lot of others (these are connected to the ground states in the
2000-3000 A region of the spectrum)

More to come...



Cordialement,
Olivier Thizy
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Re: PNV J20233073+2046041 mag 6.8

Postby Thierry Lemoult » Tue Aug 20, 2013 10:38 pm

Génial Olivier.
De mon cote, j'ai deux séries de 15x120s et je viens également de retourner la monture après avoir observé la référence HD196544.
Apres chaque séquence de 15x120s sur la cible, je fait des séries de calibration Eshel. Cela risque de faire dévier l'autoguidage.. mais bon je tente le coup. Les autres soir j'étais la pour rattraper le coup..
Déjà les deux premieres series ici: La raie H alpha monte a 5x le continus ! Et je crois la voire monter entre les deux poses première pose de ce soir. http://perso.crans.org/lemoult/spectro/myspectrodb/web-nova-del/auto-nova-del.html

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Re: PNV J20233073+2046041 mag 6.8

Postby Ernst Pollmann » Wed Aug 21, 2013 8:02 am

Here the compilation of high resolution spectra, taken with LHRES-III of last night.
The Halpha emission did increase clearly. Also the absorption component is filled up with emission.

Ernst Pollmann
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Wed Aug 21, 2013 12:04 pm

Animation of 124 spectras from 19H41 to 2H20 TU, order 34 (HAlpha line) with an eshel spectro

Image

The HAlpha line is growing up ...

Near the end of the night, the telescope was pointing behind a tree, that's why there are more noise in the spectrum.
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Wed Aug 21, 2013 3:37 pm

Here's the evolution of the nova since 7 days (Ha region)
Image

And a graph estimate the velocity of the nova on the same periode.
Image
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