Photometry of the Newly-Discovered SU UMa Star in Taurus
ATel #938; A. W. Shafter (SDSU), E. A. Coelho (SDSU), J. K. Reed (SDSU)
on 8 Nov 2006; 01:58 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)
Subjects: Optical, Cataclysmic Variable
We report the results of time-resolved CCD photometry
obtained with the Mount Laguna Observatory 1-m reflector
of the recently-discovered
variable star in Taurus (CBET #701).
A total of ~20 hours of V-band photometry over six nights
(2006 Oct 28 - 30; 2006 Nov 01 - 03) has enabled us to confirm its
tentative identification as a previously unknown SU UMa dwarf nova,
and to establish a revised superhump period
of 0.05338(1) days (76.87 min).
During our observations the system faded by
an average of ~0.08 mag per day, from a mean magnitude of V~15.6 on
2006 Oct 28.3, to V~16.1 on 2006 Nov 03.3. Over roughly the
same interval, the superhump amplitude
decreased from ~0.15 mag on Oct 28.3 to
~0.05 mag on Nov 02.4. By the following night (Nov 03.3),
the superhump amplitude
had decreased to less than 0.05 mag, rendering it impossible to
measure reliable timings from our data.
Further observations are encouraged to follow the evolution of this
newly-discovered SU UMa star, and to establish its magnitude at minimum light.
