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(cba:news) SS UMi, YY Dra, YY Sex (Joe Patterson) [2013-05-06T12:19:31Z]


Hi CBAers,

A few other stars to clarify their status. Enrique has started up the SS UMi season, and for northerners, strangely enough, the star is in excellent position for observation. The star is now around 17th and showing a strong periodic signal, and likely more than one. Just our cup o' tea... but we greatly need coverage at USA longitudes to unambiguously define the period structure. This star may give trouble since it's a frequent erupter... but I think it's probably interesting enough to declare all-out war (coverage at all luminosity states). But FOR SURE it's a great target at 17th magnitude - and get a LONG time series.

Time to bury YY Sex. Very entertaining star, with huge humps, especially in I light. But the period is rock-stable, and there is no second period as asserted in the literature. Nor is it a reflection effect, as also stated in the only publication on the star. Just a garden-variety AM Herculis star. But we have some great data, and it'll be a cute little paper.

Also time to bury YY Dra. The coverage, especially by Enrique, Jim Jones, and David Cejudo, has been good; but the detections of the fast period signals (9 and 4.5 minutes) have been *borderline*, and that's not sufficiently convincing when there are FOUR candidate signals (w, w-w_orb, 2w, 2w-2w_orb).

Is anyone (in the CBA orbit) planning to go to the SAS conference in Big Bear this year? We usually go, but won't this year, mainly because of a Kitt Peak observing run coinciding exactly with the dates. The program seemed low on variable stars, and very low on CVs. We'll make a big push for next year, though. Meanwhile, is anyone planning to go? I'd like to announce here, to help you guys, if any, find each other.

joe