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AAVSO Special Notice #182: More on the variable in Eridanus AAVSO HOME > publications > special notice

AAVSO Special Notice #182

More on the variable in Eridanus
November 26, 2009

This new variable object in Eridanus, originally called
a possible nova in CBET 2050, is most likely
a WZ Sge variable.  It matches closely the coordinates
of GSC1.2 05325-01837, listed in that catalog at 14.76mag.
At the peak outburst magnitude of 7.3, this is about
7.5 magnitudes amplitude, within the range of a galactic
variable and lower than a typical nova.  It appears to
be fading and is about V=8.5 right now.  However,
WZ Sge cataclysmic variables have a complex light curve
and the star may rebrighten.  We are awaiting spectral
confirmation and possible GCVS naming, and will pass
on that information as soon as possible.

As mentioned in Special Notice 181, the star has been
entered as VSX J044754.2-101043 and now has an AUID of
000-BJR-847.  You can submit observations to the AAVSO
with either identifier.  We have a preliminary sequence
from Mati Morel, and have obtained BVRI imagery using
the Bright Star Monitor at Astrokolkhoz Observatory
which we will use to construct a multiwavelength sequence
tomorrow (it is a national holiday in the U.S. today).

This is a good target for time series photometry, and
at its current brightness, we highly recommend using
filters.  Larger telescopes should consider B or even U
filters.

Arne

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