1. A Large, Uniform Sample of X-Ray-emitting AGNs: Selection Approach and an Initial Catalog from the ROSAT All-Sky and Sloan Digital Sky Surveys Anderson, Scott F.; Voges, Wolfgang; Margon, Bruce; Trümper, Joachim; Agüeros, Marcel Andre; Boller, Thomas; Collinge, Matthre J.; Homer, L.; Stinson, Gregory; Strauss, Michael 2003 Articles AstrophysicsGalactic nucleiActive galactic nucleiX-ray spectroscopyX-ray astronomyAstronomy