General Assembly of IAU, Symposium #238 Black Holes: From Stars to Galaxies
X-ray Spectral Evolution of AGN. Presented by: George Chartas (Penn State) In collaboration with: Cristian Saez(Penn State), Xinyu Dai(OSU), Michael Eracleous(Penn State), Niel Brandt(Penn State), Bret Lehmer(Penn State), Franz Bauer(Columbia) , Gordon Garmire (Penn State).
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