Page 1 of 3

Nova Monocerotis 2012

Posted: Mon Aug 20, 2012 8:38 pm
by admin
Une nova découverte 2012 Aug. 09.8048 UT par Shigehisa Fujikawa (Kanonji City, Kagawa Prefecture, Japan)
Discovery Magnitude: magnitude 9.4 C using a 105mm camera lens+CCD
Coordinates: 06 39 38.74 +05 53 52.0 (2000.0)

Spectres d'identifications réalisés par Stephane Charbonnel (2012 Aug. 14.137 UT) et James Edlin (2012 Aug. 14.140 UT) lors du stage de spectroscopie Aras à l'Observatoire de Haute-Provence.
Le nova a été suivie de façon intense les jours suivants.
Les spectres sont réusnis sur : http://www.astrosurf.com/aras/novae/Nova2012Mon.html
Les fits peuvent être téléchargés à partir de http://www.astrosurf.com/aras/novae/TableauSpectres.htm

Spectre d'identification par Jim Edlin
Image
Les raies nébulaires sont développées (notemment [OIII]), ce qui montre que la nova était déjà dans une phase avancée lors de sa découverte)
Au maximum de luminosité, elle a pu atteindre mag 5 environ.

Re: Nova Monocerotis 2012

Posted: Tue Aug 21, 2012 8:12 pm
by Francois Teyssier
Identification of lines on a spectrum taken on 2012-08-17

Image

François Teyssier

Re: Nova Monocerotis 2012

Posted: Thu Aug 30, 2012 5:17 pm
by Francois Teyssier
Spectre du 29 / 08 /2012
_nova2012mon_20120829_138.png
_nova2012mon_20120829_138.png (3.9 KiB) Viewed 17757 times
Note aux observateurs : cette nova mérite d'être suivie le plus longtemps possible.

Re: Nova Monocerotis 2012

Posted: Fri Aug 31, 2012 12:47 pm
by ivan degennaroaquino
This is a very bad image but hopefully it's clear: the spectrum changes, week per week (just one comparison now), are clear.
http://i.imgur.com/lvoSG.png?1

Re: Nova Monocerotis 2012

Posted: Thu Sep 06, 2012 4:30 am
by Francois Teyssier
Thank you for the comparison Ivan.
Here today spectrum. It becomes easier as the nova is higher (altitude between 24 and 31°)
[OIII] always strengthens.

Image


Aras Pages updated http://www.astrosurf.com/aras/novae/TableauSpectres.htm

Nova Monocerotis 2012 - 07/09/2012

Posted: Fri Sep 07, 2012 5:31 pm
by Christian Buil
Observation of Nova Mon 2012 taken with LhiresIII 2400 l/mm on a Celestron 8 telescope:

Image

Note: The LISA is equiped with a Atik460EX camera (bin 2x2) and the guiding camera is a Atik314L.
A view au the setup:

Image

See also ARAS nova page: http://www.astrosurf.com/aras/novae/Nova2012Mon.html

Christian B

Blue range and [Ne III] - N Mon 2012

Posted: Sun Sep 09, 2012 8:49 am
by ivan degennaroaquino
If you are curious and can push the blue wavelenght limit of the spectrograph, at 3869A the [Ne III] line emission is getting stronger. This confirms (again) it is a ONe nova.

Re: Nova Monocerotis 2012

Posted: Sun Sep 09, 2012 9:24 am
by Francois Teyssier
Thank you Ivan,

I have [Ne III] 3869 & 3968, but the spectrum is very noisy under 4000 angströms due to the poor sensibility of the CCD in near UV.
Here's a spctrum with a 5 sigma gaussian filter which shows [Ne III] 3869 & 3968
_nova_mon2012_20120906_134.png
_nova_mon2012_20120906_134.png (3.31 KiB) Viewed 17691 times

Kind regards

François

Re: Nova Monocerotis 2012

Posted: Sun Sep 09, 2012 9:26 am
by ivan degennaroaquino
There it is! Thanks Francois!

Re: Nova Monocerotis 2012

Posted: Sat Sep 15, 2012 10:43 am
by Francois Teyssier
La page Mova Mon 2012 a été mise ) jour avec un (excellent) spectre obtenu par Christian le 14/09

Image


page aras : http://www.astrosurf.com/aras/novae/Nova2012Mon.html

François Teyssier