October 12, 2007: A new large-amplitude cataclysmic binary, most likely a WZ Sge system, was discovered by K. Malek of the "Pi of the Sky" team in mid-September. It has been linked to the following ROSAT RASS object:
1RXS_J023238.8-371812
and has coordinates of
02:32:38.13 -37:17:54.7 J2000
It was about 11th magnitude upon discovery, and displayed superhumps with period 0.066d.
Starting about 2007 October 11, this CV began a dramatic fade in brightness and is now about V=16. The possible progenitor is a star about 18th magnitude, so the CV is rapidly approaching its pre-outburst brightness. It is highly likely that an echo-outburst will take place within a week or so, and we recommend that observers continue to follow this object through the current season. You can create a finding chart for the CV using VSP: http://www.aavso.org/observing/charts/vsp/ and submit data to the AAVSO using the designations: 0228-37 or RXSJ023238
A photometric calibration for the field can be found at: ftp://ftp.aavso.org/public/calib/rxj0232.dat
Good luck and clear skies!
Arne Henden
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