CONSTRAINING THE PROPERTIES OF AGN CORONAE USING A SAMPLE OF LUMINOUS comma HIGH-RE

The primary Xray emission observed in AGN is believed to be produced from atiny region surrounding the SMBH, namely the corona. A critical coronalcompactness versus temperature threshold is predicted above which any increasein the source luminosity would then generate positronelectron pairs rather thancontinue heating the coronal plasma. Current observations show that all localAGNs populate the region below this critical line. However, these models haverarely been probed in the highluminosity regime where the tightest constraintscan be made on the coronal models. Here, we propose four highluminosityquasars (zvirgul12) to more than double the current sample size of highluminosityquasars to further constrain the coronal models and thus better understand the physics of coronae. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]