[vsnet-outburst 9720] Re: [cvnet-outburst] V358 Lyr

[Daisaku NOGAMI]

Congratulations, Jeremy!  And thank you for your quick confirmations,
Shawn, and Tom!

This outburst is the first one since the discovery of this object in
photographic plates in 1965 by Hoffmeister (1967, Astron. Nach., 289,
205).  You can see this plate image in Antipin et al. (2004, IBVS 5544,
http://www.konkoly.hu/cgi-bin/IBVS?5544).  The recurrence cycle of the
outburst is 43 years!?, the longest one among dwarf novae, exceeding
that of WZ Sge, although the faintness at the maximum of this object
may have hindered our detection.  No detection of the quiescent
couterpart in Arne's deep image still suggests that the outburst
amplitude is large, and the outburst is rare.

We strongly encourage time-resolved photometry (unfiltered one is OK,
of course), and spectrocopy if possible.

Best regards,
Daisaku Nogami
VSNET Collaboration Team

On Sat, 22 Nov 2008 18:50:36 -0500
Shawn Dvorak <sdvorak at rollinghillsobs.org> wrote:

> I just took an unfiltered image of the field and believe that V358 Lyr 
> is in outburst.  I don't have any previous images to compare against but 
> using the Downes online catalog it appears that there's an object at the 
> correct location.  Using the 14.0 mag star from the AAVSO sequence I 
> measure the star at:
> 
> Nov 22.98 16.14CV
> 
> The FITS file is available at 
> http://www.rollinghillsobs.org/v358lyr-001c.fit for inspection.
> 
> Shawn Dvorak
> Clermont, FL USA
> 
> Jeremy Shears wrote:
> >
> >
> > V358 Lyr is possibly in outburst - confirmation urgently required. In 
> > a single unfiltered CCD image obtained from the Bradford Robotic 
> > Telescope this evening I made the following measurement:
> >
> > Nov 22.917 16.26C
> >
> > I reported this to Gary Poyner, who measured the same image as 16.21C 
> > (both using the AAVSO chart).
> >
> > However, we note that the position is very slightly West of the 
> > positon marked on the AAVSO chart, placing the suspect object half way 
> > between the marked position for V358 and the 175 comp. Unfortunately 
> > we only have a single BRT image and we cannot rule out a fault 
> > (doesn't look like a hot pixel), hence we cannot be sure that it is 
> > defintely V358 Lyr in outburst, thus the need for confirmation. Cloudy 
> > conditions at both my location and Gary's are preventing our confirmation.
> >
> > Jeremy Shears
> > Cheshire, UK.
> > __________________________________________________________
> > BigSnapSearch.com - 24 prizes a day, every day - Search Now!
> > http://clk.atdmt.com/UKM/go/117442309/direct/01/ 
> > <http://clk.atdmt.com/UKM/go/117442309/direct/01/>
> >
> > [Non-text portions of this message have been removed]
> >
> >  
>