January 22, 2008: Taichi Kato drew attention in vsnet-alert 9834 to another star [V498 Hya] 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 show 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 and 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 Henden
--------------------------------------------------- SUBMIT OBSERVATIONS TO THE AAVSO Information on submitting observations to the AAVSO may be found at: http://www.aavso.org/observing/submit/ SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION A Special Notice archive is available at the following URL: http://www.aavso.org/publications/specialnotice/ Subscribing and Unsubscribing may be done at the following URL: http://www.aavso.org/publications/email/