PNV J20233073+2046041 mag 6.8

Information about outbursts of eruptive stars, Be activity, ...

Re: PNV J20233073+2046041 mag 6.8

Postby David Antao » Fri Aug 16, 2013 12:31 am

Bonjour,
Hier j'étais aussi sur la nova. Voici mes résultats. J'ai pris Altair comme réf (je sais que ce n'est pas top, mais en faisant vite...)
Amicalement
David Antao
Attachments
NovaDel2013_pnvj20233073+2046041_20130815_026_David_Antao.png
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NovaDel2013_pnvj20233073+2046041_20130815_072_David_Antao.png
NovaDel2013_pnvj20233073+2046041_20130815_072_David_Antao.png (49.2 KiB) Viewed 4396 times
NovaDel2013_pnvj20233073+2046041_20130815_114_David_Antao.png
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SUPERPOSITION NOVA DEL 2013.PNG
SUPERPOSITION NOVA DEL 2013.PNG (24.37 KiB) Viewed 4396 times
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier Thizy » Fri Aug 16, 2013 12:46 am

David,


bravo! Côté référence, je suis passé sur hd196544 car elle est dans la base MILES de ISIS... à priori c'est le mieux comme référence.

Sinon, penses à envoyer tes spectres à François Teyssier. La collection sur ARAS montre combien la communauté amateur a été réactive et contribue au suivi vraiment fin de cette nova:
http://www.astrosurf.com/aras/Aras_Data ... l-2013.htm

Pour le format de fichier, c'est du BeSS avec extension .FIT et un nom normalisé pour aider à la gestion administrative des fichiers:
Cf: http://www.astrosurf.com/aras/Aras_DataBase/Usage.htm


Cordialement,
Olivier
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Re: PNV J20233073+2046041 mag 6.8

Postby Christian Buil » Fri Aug 16, 2013 1:09 am

Olivier G, très bonne comparaison sur 24 H à haute résolution spectrale et radiométrique. Poursuivre bien sur, ca
va encore bien bouger.

Au fait quant-est ce que l'on aura un réseau d'observateurs amateurs mondial pour un suivi de ce type d'objet
en quasi continu 24 sur 24 ? Un jour surement ;) Peut être qe l'observation de cette nova participera à faire bouger les choses.

Christian
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Re: PNV J20233073+2046041 mag 6.8

Postby James Edlin » Fri Aug 16, 2013 6:59 am

Tonight was clear and free from the dense forest fire smoke I had last night. Could see the nova easily and it nearly saturated the ccd in 20 sec exposure. Took new spectrum tonight with 25 cm Meade. See attached.

Jim E
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nova-del 20130816_194 JE.png
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Re: PNV J20233073+2046041 mag 6.8

Postby Paolo Berardi » Fri Aug 16, 2013 10:46 am

Hi all, finally we were able to observe the Nova using Lhires III 600 l/mm.
Observation cover entire optical domain with 4 spectra. Of course we had to refocus at short wavelength, especially in UV range.

Reference star was HD192640 (A2V) present in Miles library (I read now about "official" calibrator). The height difference between nova and star was handled thanks to atmo ratio on ISIS generated transmission curves for each height above horizon.

I attach merged spectra only for aesthetic purposes (the profile could be evolved meanwhile - about 1.5 hours). Single profiles were sent to François for nova fits database. This a very large image to better appreciate the spectral features (sorry if too large...). Resolving power vary from R=2000 (blue) to R=2500 (red).

http://quasar.teoth.it/html/spectra/Nov ... iCarlo.png

Ciao
Paolo and Giuseppe
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Re: PNV J20233073+2046041 mag 6.8

Postby James Edlin » Fri Aug 16, 2013 5:43 pm

Hi Paolo

Spectacular looking spectrum!!
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Re: PNV J20233073+2046041 mag 6.8

Postby Lars Zielke » Fri Aug 16, 2013 9:24 pm

Hi all

Here's my only shot so far of the Nova, Star Analyser - 2013-08-14 23:30 UT.

Image
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier Thizy » Fri Aug 16, 2013 10:11 pm

Hello,


after some cloudy evening, the sky go clared and this is my third nght in a row on the new nova. It is brighter than last night and I had to shorten my individual exposure from 5min to 3min. Equipment is still my small 85mm refractor and Alpy 600 spectrograph with Atik 460EX (-10°C) camera.

Spectrum is very nice but I see several changes compared to last night. The P Cygni profile are less pronounced (blue absorption less visible compare to last night) specially on Fe lines. Halpha changed profile and the line at 6660A (He I 6678A blue-shifted at a speed of ~800km/s!) disapeared. Not sure what is hapening there...


_novadel2013_20130816_862_OThizy.jpg
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_novadel2013_20130816_862_Vs_20130815_865_OThizy.jpg
_novadel2013_20130816_862_Vs_20130815_865_OThizy.jpg (53.1 KiB) Viewed 4363 times



I am now using hd196544 as reference star and MILES database in ISIS to calculate the instrumental response of my setup. But I do not take into account difference in airmass.


Cordialement,
Olivier Thizy
Vous ne verrez plus des étoiles comme avant !
http://www.shelyak.com/en/
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Fri Aug 16, 2013 11:25 pm

There are great changes in the shape of the spectrum to both Ha, but also on other wavelenght particulary in the blue.
I will soon make some comparisons, it will require to spend a lot of time to process all data.....


Il y a de grands changements dans l'allure du spectre à la fois vers Ha, mais également sur les autres ordres dans le bleue du spectre.
Je vais faire des comparaisons dés que possible, cela va demander pas mal de temps au niveau traitement.
LHIRES III #5, LISA, e-Shel, C14, RC400 Astrosib, AP1600
http://o.garde.free.fr/astro/Spectro1/Bienvenue.html
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Re: PNV J20233073+2046041 mag 6.8

Postby Olivier GARDE » Sat Aug 17, 2013 12:07 am

Here's a graphe of the evolution of Halpha region during the 3 last days.

Voici un graphe montrant l'évolution de la région HAlpha sur les 3 derniers jours à 24H d'intervalle à quelques minutes pré...

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