Microlensing of the broad emission line region in the quadruple lens SDSS J1004 4112

GT Richards, CR Keeton, B Pindor, JF Hennawi, PB Hall, EL Turner, N Inada, M Oguri, SI Ichikawa, RH Becker, MD Gregg, RL White, JSB Wyithe, DP Schneider, DE Johnston, JA Frieman, J Brinkmann