SMUDGes. II. Expanded survey & Stripe 82 cat.

The advancements include less constrained structural parameter fitting, expanded wavelet filtering criteria, consideration of Galactic dust, estimates of parameter uncertainties and completeness based on simulated sources, and refinements of our automated candidate classification.

We have a sensitivity ~1mag fainter in {mu}_0,g_ than the largest published catalog of this region. Using our completeness-corrected sample, we find that (1) there is no significant decline in the number of UDG candidates as a function of {mu}_0,g_ to the limit of our survey (~26.5mag/arcsec^2^); (1) bluer candidates have smaller Sersic n; (3) most blue (g-r<0.45mag) candidates have {mu}_0,g_<~25mag/arcsec^2^ and will fade to populate the UDG red sequence we observe to ~26.5mag/arcsec^2^; (4) any red UDGs that exist significantly below our {mu}_0,g_ sensitivity limit are not descendent from blue UDGs in our sample; and (5) candidates with lower {mu}_0,g_ tend to smaller n.