Transit timing Observations from Kepler. IV. Confirmation of four multiple-planet systems by simple physical models

Daniel C. Fabrycky, Eric B. Ford, Jason H. Steffen, Jason F. Rowe, Joshua A. Carter, Althea V. Moorhead, Natalie M. Batalha, William J. Borucki, Steve Bryson, Lars A. Buchhave, Jessie L. Christiansen, David R. Ciardi, William D. Cochran, Michael Endl, Michael N. Fanelli, Debra Fischer, Francois Fressin, John Geary, Michael R. Haas, Jennifer R. HallMatthew J. Holman, Jon. M. Jenkins, David G. Koch, David W. Latham, Jie Li, Jack J. Lissauer, Philip Lucas, Geoffrey W. Marcy, Tsevi Mazeh, Sean McCauliff, Samuel Quinn, Darin Ragozzine, Dimitar Sasselov, Avi ShporerVis 14 andreVis mindre