Correct Photometry Aperture Radius / UCAC3 Download

Subscribe to Syndicate
Submitted by Michael J. Cook on Mon, 04/11/2011 - 23:00

Learned about applying the correct aperture radius as 0.8x FWHM.  The PinPoint engine provides FWHM. The FWHM is measured by doing individual Gaussian PSF fits to the 20 brightest unsaturated stars in the plate. Checked to see that the UCAC3 catalog downloaded successfully.