September 4, 2007: The WZ Sge-candidate object HS 2331+3905 [V455 And] has been reported in outburst on VSNET by two observers. This object was last reported as fainter than 14.6 on JD 2454347.3931 (Sept 3, 2007, 21:26 UT), and has now been detected at 14.59 and 14.4 by observers in Japan. HS 2331+3905 has never been observed in outburst before, and observations are strongly encouraged.
This object is known to have a very short orbital period consistent with the WZ Sge class, and is also known to have a pulsating white dwarf primary. It may also have a brown dwarf secondary, making this a very unique object.
HS 2331+3905 is located at RA 23:34:01.55, Dec +39:21:42.9 (J2000)
You can produce a chart of this object by entering the coordinates above into VSP: http://www.aavso.org/observing/charts/vsp/index.html
Please report your observations to the AAVSO as "HS2331+390" (designation 2328+38).
This AAVSO Special Notice was prepared by Matthew Templeton.
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