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Date: Fri, 1 Aug 2003 22:12:34 -0700 (MST)
From: Brian Skiff <Brian.Skiff@lowell.edu>
Subject: re: simply scatter-red
>> ...from the graphical representations, that UCAC is pretty much shite
>> fainter than 13.0.
I think is mainly because John's test data wasn't any good either
below 13.0. The Chris Watson test---admittedly in a relatively small
region in a part of the sky that would have had data taken during
the austral summer (i.e. the better season), is the Caldwell survey
near the SGP, which includes some tens of thousands of stars with
V and V-I down to mag. 19 or so at accuracy such that all the errors
lie with UCAC. The dataset is at:
http://vizier.u-strasbg.fr/viz-bin/Cat?J/AJ/112/772
...so you can make similar comparisons on your own.
\Brian
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