[vsnet-chat 4933] Re: new southern variables

[aah@nofs.navy.mil]

Stan wrote:
>Finally, I've been setting up a stopped down Meade 8 with BVRI filters to
>measure Cepheids and Miras. But maybe the telephoto lens is the way to go.
>Seems so from Vello's results.
  Those are two different approaches.  For followup observations, I would
prefer the better pixelization you will get from the Meade 8; the photometry
should be superior.  In addition, the BVRI filters are much better
than no filters, or just one filter, when using a telephoto.  I'm surprised
you are stopping the system down, as there should be very few bright variables
you cannot observe full aperture.
  For discovery, wide field is essential and a telephoto fits the bill.
Note that ROTSE-I uses Canon telephoto lenses and has discovered
thousands of variables in the north; a similar system in the south would
be great fun.  ASAS is close, but at last glance was not doing an all-sky
survey.  Once the sky has been covered to ~14th mag, then you have to start
using larger apertures; a fun exercise in itself.
  I'd recommend the AAVSO Hawaii meeting for discussions relating to
observation depositories.  It is being touted as a Pan-Pacific meeting
and will be combined with a high-energy workshop as well.  I hope to
make it there if I can find funding.
Arne

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