astrometry issues

In research time stolen from exam preparation and proctoring, I worked on trivial matters related to astrometry.net, including web pages, administration of the alpha test, meeting minutes, filing tickets, etc. We got the following in an email from alpha tester Chris Kochanek (OSU), who has been using the system to great effect: When I describe this [astrometry.net], all the observers want the code to install now. Congrats to all involved!. That improved my day.

In other news, UofT undergrads Jon Barron and Christopher Stumm have been looking at cleaning up the USNO-B1.0 catalog. Here is a plot of a healpix pixel of the sky, in which they have plotted the USNO-B1.0 catalog entries that have colors that aren't consistent with being (correctly measured) stars.

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