The following plots show the 2-D projection (in the flux plane) of the parametric scores, including the general star-galaxy discriminents, "mxdn" and "sh", as well as the double and triple star discriminents, "wsh", "msh", "vint" and "r23". The integrated flux is represented by the 20 mag per arcsec**2 isophotal mag.
For more information on the various star-galaxy discrimination parameters, see Star - Galaxy Discrimination Parameters .
Symbols:
Since double and triple stars are "extended" relative to isolated stars (with which the ridgefile is determined), their parametric value (i.e., score) is degenerate with galaxies. Other parametric measures, such as the FWHM or image moments, will also be inadequate discriminators of real galaxies from non-extended objects.
N-space score cluster is projected into the viewing plane: parameter vs score value. The plots below demonstrate this method.
Five gif plots are given below, one for each mag band (to view only objects with approximately the same integrated flux). Real galaxies are colored green, stars orange, double stars red and triple stars blue. The N-space scores include: mxdn, sh, wsh, msh, vint, r23, R(3sig) and normalized darea. The latter two parameters respectively refer to the 3-sigma isophotal radius (semi-major axis) and the differential area between the 5-sigma and 3-sigma isophotes (normalized by the 3-sigma isophotal radius).
