SN AT2020vak in M31

SN AT2020vak in M31

Postby Dubreuil Pierre » Tue Oct 20, 2020 4:20 am

Bonjour a tous

Mon collègue Matthieu Conjat, president de notre association d'astronomie AQUILA à Nice signale une forte activité de cette SN !
Il me demande si des spectres pourraient etre realisés .
Toute l'info ici http://www.astrosurf.com/topic/140862-g ... -dans-m31/

Cordialement

Pierre
Dubreuil Pierre
 
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Re: SN AT2020vak in M31

Postby Robin Leadbeater » Tue Oct 20, 2020 5:00 pm

Hi Pierre

It is an interesting transient but why do you say it is a supernova? I think that it is unlikely to be a supernova from the brightness
http://xjltp.china-vo.org/xm37mz.html
and the spectrum
https://wis-tns.weizmann.ac.il/object/2020vak

Cheers
Robin
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Re: SN AT2020vak in M31

Postby Dubreuil Pierre » Tue Oct 20, 2020 5:19 pm

Hi Robin

At one point, the doubt was there!
It seems now with the first spectra that this would indeed be more of a Nova signature.
Our specters will confirm all of this.

Pierre
Dubreuil Pierre
 
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Re: SN AT2020vak in M31

Postby Robin Leadbeater » Tue Oct 20, 2020 7:24 pm

Hi Pierre,

it is quite bright for a nova in M31 though and it does not show any nova features in the spectrum yet so it will definitely be interesting to try to take more spectra. It could perhaps even be a foreground dwarf nova. Has anyone looked in images for a precursor? (probably difficult because of the brightness of M31 background)

Here are a few M31 nova spectra with the ALPY 600

Cheers
Robin

ALPY600_M31_novae.png
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Re: SN AT2020vak in M31

Postby Lionel Mulato » Thu Oct 22, 2020 7:14 pm

Hi,

Here is the spectrum I've performed, hope there will be others.
The nova is very close to bright core of m31, thus the continuum may not be reliable.

7x20 min, Newton 200 mm F/5, Alpy600, atik414 bin 2x2, 2020/10/18.976.

Image
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