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(cba:news) V455 And and HS2219+1824 (Joe Patterson) [2009-08-26T16:24:33Z]


Further to Bob and Etienne's cba-chat...

V455 And has periodic signals on timescales from 34 s to 3.5 hours. Most of them are reliable, others wander a bit... and except for the orbital period, I'd say they are all still of unknown origin. (In fact, I don't think Porb is 100.00% nailed either - but awfully close.) A few CBAers might be able to resolve that fast period, but most should probably settle for the 30-60 s time resolution that this magnitude (16) probably permits. That will bring everything into play except the fast signal; we'll try to resolve the latter with some bigger-scope data.

Just a touch earlier in the night, it's time to jump on HS2219+1824... which Gianluca Masi has found to be flashing waves that look awfully like superhumps. This one won't be with us long!

joe