[vsnet-alert 16437] Re: V2289 Cyg outburst

[Seiichi Yoshida]

Dear colleagues,

We found that a dwarf nova V2289 Cyg, an UG type with a range of
15.7-<19.0 mag(V), which we have reported the outburst up to 16 mag on
Aug. 12, is bright around 15-16 mag still on Sept. 18.53(UT) from 
Youichirou Nakashima's survey images with Canon 500-mm f/4.5 camera
lens + SBIG ST-8 in the course of the MISAO Project.

I do not know if V2289 Cyg keeps bright for over one month, or another
outburst occured within a short period.

Best regards,

> Dear Taichi Kato,
> 
> Thank you very much for your comment.
> 
> I published the image of this outburst:
> 
>   http://www.aerith.net/misao/report/variable/V2289_Cyg.gif
> 
> Best regards,
> 
> > Re: V2289 Cyg outburst
> > 
> > > We detected that a dwarf nova V2289 Cyg, an UG type with a range of
> > > 15.7-<19.0 mag(V), in outburst at around 16 mag on Aug. 12.60(UT) from 
> > > Youichirou Nakashima's survey images with Canon 500-mm f/4.5 camera
> > > lens + SBIG ST-8 in the course of the MISAO Project.
> > 
> >    Porb = 0.142 d according to RKCat (Thorstensen, in a poster paper).
> > So it's likely an SS Cyg-type.
> > 
> > Kepler Input Catalog:
> > 1	 1.116	19 34 36.197	+51 07 42.39	12361025	293.650820	+51.128441 	 	16.918	17.015	17.143	15.858	15.399	17.086	0	0	0	1
> > 
> >    The reference to VSNET in AAVSO VSX is incorrect.
> > The correct one is:
> > 
> > http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert5000/msg00142.html
> > 
> > 1H 1933+510 outburst (Bryja)
> > 
> > Date: Sun, 23 Jul 2000 04:03:37 -0500
> > From: cob585f <cob585f at mail.smsu.edu>
> > 
> > To anyone interested:
> > 
> > I have found the "nova-like" CV 1H 1933+510 = Cyg2 in the Downes & Shara
> > catalogue (1987, PASP 105:127) to be more than three magnitudes high.
> > Clouds are coming in at my location, but I have been observing it since
> > 5.85 UT (July 23, 2000). It's now 8.5 UT, and I have taken several CCD
> > images.
> > 
> > Downes & Shara list this star as "nova-like" which implies it's not a
> > dwarf nova. If this is correct the star is most likely a VY Scl star
> > that's been spending a lot of time in the low state. However, I think
> > it's likely a dwarf nova of some kind because of its photometric
> > behavior. I need to confess that because of a mis-ID on a finding chart
> > I failed to notice an earlier outburst that (luckily) I caught on the CCD
> > frame anyway in November 1999. The mistaken identification on the earlier
> > images was something I just discovered a month ago, but they all have
> > the correct star visible in the field. I have observed this star in
> > June 1999, November 1999 (outburst), and then on multiple occasions
> > from late May 2000 to the present. Except for the November 1999
> > outburst, the star has stayed fainter than 17th magnitude. Because
> > of the earlier outburst, I've been trying to observe it every chance
> > I get to see if the outburst repeats. Well, tonight it did! It's
> > again up at least three magnitudes, and there is no mistake about
> > which star it is this time.
> > 
> > I lack the equipment necessary to get good time resolution which would
> > help settle the question of what type of CV this star is. I'm posting
> > this in the hope that someone else can pick up the observations where
> > I'm about to leave them off. The orbital period of this star in listed
> > in a table in Warner's book at approximately 3.3 hours. Even if I could
> > get good time resolution, the clouds here are doing me in. I haven't
> > been able to observe continuously because of them and high humidity.
> > 
> > So I hope I can pass the baton to someone else who can follow up on
> > this.
> > -- Claia Bryja
> > Southwest Missouri
> 
> --
> Seiichi Yoshida
> comet at aerith.net
> http://www.aerith.net/

--
Seiichi Yoshida
comet at aerith.net
http://www.aerith.net/