Nova Cyg 2014 = PNV J20214234+3103296

Information about outbursts of eruptive stars, Be activity, ...
Paolo Berardi
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Joined: Thu Sep 29, 2011 10:51 pm

Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Paolo Berardi »

My last observation, 12.9 aug 2014. Two Miles reference stars for flux calibration, HD 176301 and HD 196544.

Image

4.9 and 12.8 august comparison of the same spectral range.

Image

During large slit operations (long exposure guide camera frame). Target is slightly slit off-axis to avoid contamination by a field star.

Image

Paolo
Jacques Montier
Posts: 242
Joined: Sun May 13, 2012 2:46 pm

Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Jacques Montier »

Hello,

Nova Cyg of the last night
NovaCyg.png
NovaCyg.png (18.05 KiB) Viewed 7055 times
My first try of measuring flux with Christian Buil first method and 23um/230um slit
NovaCyg_flux.png
NovaCyg_flux.png (18.31 KiB) Viewed 7055 times
Regards,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Jacques Montier
Posts: 242
Joined: Sun May 13, 2012 2:46 pm

Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Jacques Montier »

Hello all,

Flux comparison of the nova on 20140820, 20140829 and 20140901
novacyg_flux_comparison.png
novacyg_flux_comparison.png (9.34 KiB) Viewed 7018 times
novacyg_flux_comparison2.png
novacyg_flux_comparison2.png (14.3 KiB) Viewed 7018 times
novacyg_flux_anim.gif
novacyg_flux_anim.gif (23.84 KiB) Viewed 7018 times
Cheers,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Francois Teyssier
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Francois Teyssier »

Nova Cyg 2014 in nebular phase
NovaCyg2014.png
NovaCyg2014.png (4.79 KiB) Viewed 6988 times
Note the development of [OIII] 5007, 4959, [OII] and also He I lines 5876, 6876, 7085 ("Helium flash")

François
Tim Lester
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Location: Arnprior Ontario

Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Tim Lester »

Nova Cyg for Sept 17 calibrated for flux.
Multiplying by the V Bessel function gives a V magnitude of 12.65, in very good agreement with AAVSO data.
_nova_cyg_2014_flux_20140917_030_tlester.png
Tim
Francois Teyssier
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Francois Teyssier »

Very fast evolution,
noticelly [OIII] lines
novacyg2014.png
novacyg2014.png (5.47 KiB) Viewed 6897 times
A daily coverage should be usefull for a few days

François
Francois Teyssier
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Francois Teyssier »

Thanks to Joan and Antonio 's spectrum, we can establish that the "[OIII] flash" occured precisely between 20.9 and 21.8 of september
.png
.png (5.37 KiB) Viewed 6866 times
François
Jacques Montier
Posts: 242
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Jacques Montier »

Hello,

Here is the nova spectrum of the last night
novacyg.png
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Cheers,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
Christian Buil
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Christian Buil »

A spectrum taken the 19.9 / 09 / 2014, not perfect but can help for follow fast evolution.
Peculiar spectrum because it is one of the first light of setup presented here

http://www.spectro-aras.com/forum/viewt ... ?f=6&t=917

Christian
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_nova_cyg2014_20140917_803.png
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Jacques Montier
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Re: Nova Cyg 2014 = PNV J20214234+3103296

Post by Jacques Montier »

Hello,

Nova Cyg on 25/09
novacyg.png
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Regards,
--
Jacques Montier
Societe d'Astronomie de Rennes
IAU code J23
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