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[vsnet-chat 5554] Re: Celestial regions where matching between image and chart is hard
- Date: Thu, 3 Oct 2002 11:30:28 -0700 (MST)
- To: comet@aerith.net
- From: Brian Skiff <Brian.Skiff@lowell.edu>
- Subject: [vsnet-chat 5554] Re: Celestial regions where matching between image and chart is hard
- Cc: vsnet-chat@kusastro.kyoto-u.ac.jp
- Delivered-To: vsnet-chat@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp
The solution in these crowded areas, where the plate-scanning and
blob-finding are overwhelmed by the density of star images, is simply to
use a different catalogue! In the skt south about -20 Dec, just about
the _only_ catalogue I would recommend for your purposes is UCAC1.
This is readily obtained from the data centers, such as:
http://vizier.u-strasbg.fr/viz-bin/Cat?I/268
The accuracy of the coordinates is 10x better, and there will be no
spurious entries such as in USNO-A2.0.
\Brian
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