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AAVSO Special Notice #94: Possible CV in Hya AAVSO HOME > publications > special notice

AAVSO Special Notice #94

Possible CV in Hya
January 22, 2008

Taichi Kato drew attention in vsnet-alert 9834 to another
star on the CBAT unconfirmed observations page:

2008 01 19.592   08 45 55.08 +03 39 29.7          13.3

Hiroyuki Maehara in vsnet-alert 9847 indicated that his
observations of the star did not showi any sign of ordinary
superhumps, but did show small amplitude (~0.1mag) modulations.

Martin Nicholson also imaged the object using a robotic
observatory in New Mexico, getting
2454485.83625 13.46V 
2454485.83435 13.48B 

This confirms the outburst and the blue color, indicating
that it is probably a cataclysmic variable in outburst.

The position matches the following USNO-B source:
USNO-B1.0 0936-0175941	08 45 55.08 +03 39 29.3  B1 20.99 B2 19.74
and with the SDSS object
08 45 55.07 +03 39 29.3	J084555.07+033929.2
20.579 20.587 20.587 20.849 20.988 (ugriz)
obviously indicating that the progenitor was also blue,
and that the outburst amplitude is about 7 magnitudes.

This is likely another WZ Sge subclass star, and is a
good candidate for monitoring until it fades from this outburst.

We will get it added to VSX and VSP/AID as soon as possible.
Arne
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