00339nas a2200121   4500000000100000000000100001008004100002100001500043700001700058245012800075300000600203490000800209       2012                            d1 aD. Psaltis1 aT. Johannsen00aA Ray-tracing Algorithm for Spinning Compact Object Spacetimes with Arbitrary Quadrupole Moments. I. Quasi-Kerr Black Holes  a10 v745