[vsnet-ecl 747] Periods of EB's

["Sebastian Otero" <varsao@fullzero.com.ar>]

Dear colleagues,

As an active EB observer I couldn't help noticing a lot of eclipsing
binaries with no periods listed in the GCVS.
My research is mostly focused on Hipparcos' EA's in need of a period. I am
just about to publish a paper with at least 5 new light elements for some of
these stars.
While analysing some of the EA's from the huge list discovered by Hipparcos
(I am working now with the bright end) I noticed that most of them have
their periods worked out right there in the catalogue, so I don't understand
why the GCVS team didn't include their periods.
Generally the periods suggested in the notes and not properly stated in the
variability annex are wrong but the published periods give pretty nice light
curves so they are right.
There is also a lot of other EB's without a period in the GCVS. Why is this?
Only lack of time for compiling those data?
When you observe an EB, a period is very important so it is the lack of it,
because that is the main reason to observe it.
Right now, a time consuming research through SIMBAD and Hipparcos webpage is
needed to actually know if a given star has its period worked out or not.

Regards,
Sebastian.



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