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(cba:news) Fwd: (cba:chat) V418 Ser, a new ultra-short period DNe? AM CVn type? (Joe Patterson) [2014-05-23T09:48:26Z]


GREAT target for follow-up tonight, and likely all subsequent nights during the outburst!

joe


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CRTS detected this object in outburst on May 21 at 15.6 mag (link to the CRTS light curve below)

 http://nesssi.cacr.caltech.edu/catalina/20010321/103211010824100533p.html

No much seems to be known about this object (type UG in VSX; no clue about its periodicities). From the CRTS light curve, outbursts
are not infrequent.

I've been with this target tonight and the light curve shows a 64-min signal (light curve attached). An ultra-short period DNe? An AM CVn-type star? From inspection of the light curve in Rykoff et al. (2004) IBVS 5559, this eruption is probably fresh
and may last another 7-10 days

Enrique


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