[vsnet-alert 16221] Re: V2289 Cyg outburst

[Seiichi Yoshida]

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/