[vsnet-alert 3268] Re: Nova Aql 99 photometry

[Alon Retter <ar@astro.keele.ac.uk>]

Dear Rudolf,

I'm sorry to say that amplitudes are a matter of luck.
Sometimes, you catch the system in a high inclination angle,
and you observe deep eclipses that can reach a magnitude or more. 
When, however, the inclination is smaller, the amplitudes are smaller,
and might be undetected to us. The typical amplitude we detected is 
~0.1-0.2 mag, but again the scatter is large. The amplitude usually 
becomes bigger with the nova decay, but then the nova is fainter,
and observations are harder.

I'm currently out of my institution for the next 3 weeks, so about 
data / papers on young novae, I suggest you to check my publications in
the ADS archive.

Good luck with the observations!

Regards,
Alon
-------------------------------------------------------------------------
On Wed, 21 Jul 1999, Center for Backyard Astrophysics Brno station wrote:

> 
> Dear dr. Retter,
> 
> many thanx for your reaction. Of course we try to make as long as possible 
> runs but you don't know what the weather do. Yesterdays run was stoped
> by clouds so we went for a sleep. I'll try to make another observation
> and mainly spent some time on better images analyzis than yesterday. (I
> made only poor reduction "to see").
> 
> Could you please tell us somethink about amplitudes of changes? Or - better 
> - is there some URL with observations of this phenomenon.
> 
> With best regards
> 
> Rudolf Novak
> >Anyway, since
> >typical nova periods range between ~2-10 hours 
> >(with a peak around 
> >~3.5-4 hr), a 2-hr run is usually useless 
> >unless spin periods of the
> >rotating white dwarfs are observed. Longer runs 
> >and red filters are
> >preferred.
> 
> 
> -- http://email.seznam.cz 
> -- email zdarma na cely zivot
> 
>

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