November 21, 2010: Hitoshki Yamaoka reports in VSNET-ALERT 12411 of the observation by Itagaki of SDSS J160501.35+203056.9, a suspected cataclysmic variable. In quiescence, it is about mag20. Itagaki-san's observation on 2010-11-21 was 12.0 unfiltered. If confirmed, this would yield an outburst magnitude of 8 magnitudes, and would place it in the realm of the WZ Sge class, rare stars in the cataclysmic category that have superoutburst cycles of decades. The spectra in Szkody, et al. 2009AJ....137.4011S shows some central absorption, so it may be a high inclination system with eclipses.
Confirmatory observations are requested, and monitoring of this object will be important in ascertaining its classification and obtaining its first outburst light curve. You can submit your data to the aavso using the SDSS name above, or else its AUID of 000-BJQ-868.
This special notice prepared by A. Henden
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