Simulated Early Type Galaxies

We created various ensemble simulated images, to extensively test various aspects of GALPHAT under a variety of circumstances: (1) varying $r_{e}$ and the shape parameter $n$ as a function of S/N and PSF FWHM (Ensemble A); (2) varying the position angle (PA) and $n$ as function of PSF FWHM, and assuming typical values for $r_{e}$, $q$ and S/N (Ensemble B); (3) varying the axis ratio $q$ as function of PSF FWHM, $n$ and considering typical values for S/N and $r_{e}$ (Ensemble C); (4) varying $n$ and PSF FWHM, for a comparison between GALPHAT and GALFIT (Ensemble D); (5) galaxies with a real distribution of ETG structural parameters based on the SPIDER project (Ensemble E); and (6) galaxies with central point sources to test the Bayes-factor model classification as a indicator of nuclear activity assuming typical PSF FWHM and S/N (Ensemble F). [1]La Barbera, F., de Carvalho, R. R., de La Rosa, I. G., Lopes, P. A. A., Kohl-Moreira, J. L., and Capelato, H. V., “SPIDER - I. Sample and galaxy parameters in the grizYJHK wavebands”, Monthly Notices of the Royal Astronomical Society, vol. 408, no. 3, pp. 1313–1334, 2010. doi:10.1111/j.1365-2966.2010.16850.x