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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; 1:58 UT
Password Certification: Allen W. Shafter (aws@nova.sdsu.edu)

Subjects: Optical, Cataclysmic Variables

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.


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