psphot Galaxy Parameter Measurements

For PV3 we plan to add some additional measurements of extended sources in psphotStack. This note describes these measurements and includes some results from a test on the SAS2 region.

Asymmetry Indices

In Section 5.6 of a paper published in ​2002 Simard et. al. described two measurements performed for use in the morphological classification of galaxies (ee section 5.6).