[vsnet-campaign 588] WY Tri: another call for intensive observation!

[Taichi Kato <tkato>]

WY Tri: another call for intensive observation!

   Tonny Vanmunster reports the following.  This star is another excellent
target for the evening - midnight observation.  Since the amplitude of
the present outburst is rather low (as compared to usual superoutbursts),
the finding may suggest that the variation could be a signature of a new
phenomenon.  Excellent work, Tonny!

Subject: [vsnet-alert 5442] WY Tri - a new UGSU type variable

Dear colleagues,

I just concluded a CCD photometry session on WY Tri, lasting for 4.6 hours,
using the 0.35-m f/6.3 telescope at CBA Belgium Observatory [2000, December
20/21]. All FITS images were acquired with an ST-7 CCD camera without
filters, and were instanteneously processed and reduced (PSF photometry).
The resulting real-time light curve clearly shows the presence of a 0.38 mag
modulation, to be attributed to superhumps. A first rough estimate of the
superhump period yields a value of 0.0786 d.

The above observations thus establish WY Tri as a new member of the UGSU
type of cataclysmic variables !

Further high-speed photometry is highly recommended, to settle the precise
superhump period value. Support from other observatories would be highly
appreciated, although I assume that most attention likely will go to the RZ
Leo outburst ...

Best regards,

Tonny Vanmunster
CBA Belgium Observatory

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