Jenke P.A.,Marshall Space Flight Center |
Finger M.H.,Universities Space Research Association |
Wilson-Hodge C.A.,Marshall Space Flight Center |
Camero-Arranz A.,National Space and Science and Technology Center
AIP Conference Proceedings | Year: 2011
OAO 1657-415 is an eclipsing X-ray binary pulsar that has undergone several torque reversals throughout its long history of observation. We present a frequency history spanning nearly 19 years of observations from the Burst and Transient Source Experiment (BATSE) and from the Gamma-Ray Burst Monitor (GBM). Orbital ephemerides of the pulsar system is obtained at several intervals throughout this history. With these ephemerides, statistically significant orbital decay is established. © 2011 American Institute of Physics.