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(cba:news) V893 Sco (Joe Patterson) [2013-07-15T12:32:21Z]



Hi CBAers,

Koji Mukai has reminded me of our pathetic knowledge of a very important dwarf nova, V893 Sco. It's bright, nearby, quite X-ray-luminous, and has a very short Porb. Plus it has outbursts, doubled emission lines, and probable eclipses. It oughta be royalty among the SU UMas. But actually, despite these shiny credentials, it has never really even acquired citizenship in that realm.

Why not? Because neither superoutbursts nor superhumps have ever been reported. Probably those of us interested in such things, e.g. me, have shied away from studying this star. But now that the SU UMa phenomenon has become decidedly the norm, we ought to be interested in the well-documented exceptions, if indeed they are well-documented.

V893 Sco is still moderately in season for southerners. I think it would be a great target for long-term CBA coverage, starting now.

joe p

p.s. Koji also sent me this advertisement for my favorite TV program of my youth. Growing up in Yokohama, it taught me that you can outwit even superpower-equipped villains, if you have a pure heart, a Honda 50, and a dog.

	http://www.youtube.com/watch?v=HlPco-SUyRk