[vsnet-alert 14866] Re: nova Mon 2012

[Kirill Sokolovsky]

Dear everyone,

let me also draw your attention to the fact, that Nova Mon 2012 is likely 
the third classical nova detected in GeV gamma-rays 
(ATel #4310; http://www.astronomerstelegram.org/?read=4310 ) the other two 
being Nova Sco 2012 (ATel #4284; http://www.astronomerstelegram.org/?read=4284 )
and V407 Cyg in 2010 (Abdo et al. 2010 Science, 329, 817 ; 
http://arxiv.org/abs/1008.3912 ).

The gamma-ray emission of classical novae is new and very interesting 
field of investigation. The big question: why do we see some classical 
novae in gamma-rays but not other, apparently similar, novae is open.
After the 2010 V407 Cyg event, there was the assumption that 
gamma-ray emission may be generated, if nova erupts in a symbiotic binary 
system, through the interaction of the nova shell with the red giant wind.
But the recent identifications of Nova Mon 2012 and Nova Sco 2012 (that 
do not seem to be symbiotic systems) with gamma-ray transients seems to 
defy this assumption.

It would be great if someone could determine or at least constrain Nova 
Mon 2012 explosion date with optical satellite observations. Also both
Nova Mon 2012 and Nova Sco 2012 deserve detailed photometric and 
spectroscopic investigation.

With best wishes,
Kirill Sokolovsky



On Mon, 20 Aug 2012, Seiichiro Kiyota wrote:

> Dear all,
>
> Nova Mon 2012 was discovered at very low in morning sky (just after conjunction).
> Reported spectrum (like nebular phase) and lightcurve indicate that maximum of this nova was long before discovery.
> Proposed range of outburst (more tan 8 mag) indicates that maximum may be much brighter.
>
>
> Like V598 Pup, maximum of this nova might be recored in a survey or a satellite.
> Has any one checked?
>
>
>                            Seiichiro Kiyota
>                            VSOLJ, Japan
>