From: Isobel Hook (imh@astro.ox.ac.uk)
Date: Wed Nov 06 2002 - 14:52:27 PST
Hi Saul,
That is correct - we did find a guide star for 074 but not 007. We are
using the positions from SNtrack, which I am assured should be good to a
few arcsec. If they are not, and the difference is so large that it makes
the difference between thinking we have a guide star or not (i.e greater
than about 30" error), then we will have to redo all our Phase-II
preparation. I am still in my hotel now but I'll have another look at
these two when I get to the office.
Isobel.
On Wed, 6 Nov 2002, Saul Perlmutter wrote:
> Hi Isobel,
> Is it true that you found Gemini guide stars for -074, but not for
> -007? These are the two that Naoki pointed out are really the same
> candidate, with essentially the same finding chart, so I was wondering
> if when you check for Gemini guide stars you might be using the coords
> from the tiles, rather than the (accurate) coords from the finding
> chart.
> Also, please confirm that you _do_ in fact have a good Gemini guide
> star for this one, so I know not to get another telescope to do it.
>
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