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(cba:news) V482 Cam and V1159 Ori (Joe Patterson) [2013-12-17T07:20:11Z]


Dear CBAers,

Thanks for the fast, intense response to BZ Cam. At last it's a winner... and keep it up.

Enrique has found another in the Giraffe: V482 Cam = HS 0728+6738.
This 15.8 mag star has deep eclipses every 3.3 hours, but his data show a probable detection of 2 (and possibly 3) other periods - which, if true, would fit neatly into the positive-and-negative superhump story we have been peddling for these 3-5 hour novalikes. So far, we have no data at all from other observatories, especially the North American longitudes which would likely solve the alias problem and clarify the stability of these signals. (Transient, unstable signals are a dime a dozen.)

During these nights of Olde Whiteface, it's tempting to go for the brighter star. But consider this new target. It'll be around for a while - practically forever in that constellation - but observations close in time to Enrique's (viz., now) will have maximum leverage to resolve these issues of periodic behavior.

Then there's V1159 Ori. Nobody can get long runs on this star, so it will take a lot of global coverage to string together a really good light curve. Consider making it a regular item on your observing menu. Especially from NZ and AU - those longitudes would be really helpful in decoding the periodic behavior.

joe

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