AAVSO Special Notice #63: outburst in HS 2331+3905

The WZ Sge-candidate object HS 2331+3905 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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