Deciphering the Remarkable X-ray Spectrum of the Weak-Line Quasar SDSSJ1521+5202

Recent investigations of weakline quasars (WLQs) have led us to propose asimple model where a thick inner accretion disk, associated with an extremelyhigh Eddington ratio, is responsible for both their weak lines and remarkableXray properties. We propose to test this model with a long observation of theoptically ultraluminous WLQ SDSS J1521+5202. Our Chandra data show this sourcehas a strikingly hard Xray spectrum suggesting heavy absorption. The proposedhighquality XMMNewton spectrum will determine if we are seeing the model.spredicted Comptonreflection dominated continuum due to Comptonthick absorptionby the inner disk. If confirmed, our model will help establish relationshipsbetween inner accretiondisk properties and the accretion rate in all quasars. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]