Structural parameters of galaxies in CANDELS

Sersic model fits for these objects are produced with GALFIT in all available near-infrared filters (H_F160W_, J_F125W_ and, for a subset, Y_F105W_). The parameters of the best-fitting Sersic models (total magnitude, half-light radius, Sersic index, axis ratio, and position angle) are made public, along with newly constructed point-spread functions for each field and filter.

Random uncertainties in the measured parameters are estimated for each individual object based on a comparison between multiple, independent measurements of the same set of objects. To quantify systematic uncertainties, we create a mosaic with simulated galaxy images with a realistic distribution of input parameters and then process and analyze the mosaic in an identical manner as the real data.