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(cba:news) NR TrA, sound the drums (Joe Patterson) [2013-08-22T21:58:30Z]


Dear CBAers,

The CBA coverage of NR TrA, while excellent this year, ended >2 months ago. That seemed enough at the time, since it seemed that the period (presumed orbital in origin) was stable. However, Fred Walter (Mr. MR TrA, and on the verge of being Mr. Nova) tells me now that he suspects, based partly on our earlier data, that the period wanders slightly. That's a whole different ballgame! (Sorry for the slang, foreigners, but you get the idea.)

So we have enormous need for NR TrA time-series now. The period (orbital, or whatever it is) is long and the season is late, but with our strategically placed southern observers - S Africa/Chile/NZ/AU - we have a fighting chance of battling all that southern ocean and accurately defining the star's present period and waveform.

At least the declination is favorable.

Josch, I'd nominate this one for evening coverage. The variations are relatively slow, and V1432 Aql can wait a few weeks (plus get northern help, unlike TrA). And Gordon, it's good for eastern AU, or for that matter any AU, as well.

joe
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