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Huntsville, AL, United States

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. Source

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