Abstract
AGN are identified in deep HST surveys via a number of selection techniques and wavelengths. This work compares the samples of AGN selected via optical variability, X-ray and mid-IR indicators in HST survey fields. Recent results from the HST GOODS-South field reveal that 57% of X-ray and mid-IR selected AGN are also optical variables. Several X-ray-only AGN are variables as well as a few mid-IR-only selected sources. We investigate the nature of the identified AGN and the role of obscuration among the various selection techniques.
