TY - JOUR A1 - D. Psaltis A1 - T. Johannsen AU - BT - ApJ IS - 1 LA - eng PY - 2012 EP - 1 T1 - A Ray-tracing Algorithm for Spinning Compact Object Spacetimes with Arbitrary Quadrupole Moments. I. Quasi-Kerr Black Holes T2 - ApJ TI - A Ray-tracing Algorithm for Spinning Compact Object Spacetimes with Arbitrary Quadrupole Moments. I. Quasi-Kerr Black Holes VL - 745 Y1 - 2012 ER -