2 Comparison of fwhm/whisker from different methods based on images from 11/24/2012¶
I compared the fwhm and whisker measured from different methods based on the good images taken on 11/24/2012. I choose the quantities from weighted moments (with weight kernel size of 0.54 arcsec, 2 pix) as fiducial value and plot all others against. The results are shown in the following plots:
As a brief summary, the fwhm from IH are consistently much smaller than the others. The whisker length from QR and IH are comparable, and in between those from the adaptive moments and my run of sextractor.
Here are some plots that compare only the IH and QR based on a few nights' results: