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[vsnet-chat 5634] Southern EBs without periods
- Date: Thu, 14 Nov 2002 09:09:38 -0500
- To: vsnet-chat@kusastro.kyoto-u.ac.jp
- From: Dbwilyumz@aol.com
- Subject: [vsnet-chat 5634] Southern EBs without periods
- Delivered-To: vsnet-chat@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
Sebastian --
One group of southern eclipsing binaries without periods in the GCVS comes from Hoffmeister's discoveries at Sonneberg. He went south to observer (take photos) for only a few months. He often had enough plates to show that a star was a deep eclipsing variable, but not enough plates to solve the period. One of my major projects at Harvard Observatory has been to investigate every eclipsing binary in the GCVS without a period that has southern declination, is 11.0 ptg or brighter at maximum, and has an amplitude of 0.7 magnitude or more. I have just about completed the plate estimates for this list.
David B. Williams
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