[vsnet-alert 11436] Re: HS 2219+1824 outburst

[Gianluca Masi]

Dear Colleagues,

as earlier reported, this star gas faded to about mag 16.3,
but it is clearly humping. My data so far suggest a period
of about 1.58 hours for this 0.2 mag large modulation.

After removing a fading trend, here it is the curve:
http://virtualtelescope.bellatrixobservatory.org/hs2219.jpg

Best,
Gianluca

----- Segue Messaggio Originale  -----
Da : "Gianluca Masi" <gianluca at bellatrixobservatory.org>
A : Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>,
suuma at yahoogroups.com, variable_star_forum at yahoogroups.com,
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp,
vsnet-alert at yahoogroups.com,
vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp,
vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp,
vsnet-outburst at yahoogroups.com
oggetto : [vsnet-alert 11435] Re: HS 2219+1824 outburst
Data : Tue, 25 Aug 2009 21:39:24 +0200

> Dear All,
> 
> I've just checked this star and it is at about mag 16.3
> (clear). Started a quick time-resolved photometry run.
> 
> Regards,
> Gianluca
> 
> ----- Segue Messaggio Originale  -----
> Da : Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>
> A : suuma at yahoogroups.com,
> variable_star_forum at yahoogroups.com,
> vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp,
> vsnet-alert at yahoogroups.com,
> vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp,
> vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp,
> vsnet-outburst at yahoogroups.com
> oggetto : [vsnet-alert 11421] Re: HS 2219+1824 outburst
> Data : Sun, 23 Aug 2009 12:24:56 +0900
> 
> > > Visual magnitude estimates by P. Schmeer, Bischmisheim
> > > , Germany: HS2219+1824 20090821.90  <135 Scp
> > > HS2219+1824 20090822.872  122 Scp
> > 
> >    HS 2219+1824 is an SU UMa-type dwarf nova, whose past
> > superoutbursts were only insufficiently observed.  If
> > the current outburst is a superoutburst, time-series
> > observations are requested and the object is very
> > favorably located.
> > 
> >    The last reported outburst was in 2008 October
> > (normal outburst). The last likely superoutburst was in
> > 2007 April-May. The object is located at 222144.797
> > +184008.38 (2000.0).