10 Years of RXTE Monitoring of Five Anomalous X-Ray Pulsars

Anomalous X-ray Pulsars are believed to be magnetars: young, isolated neutron stars powered by a large magnetic energy reservoir. Here, we review recent observational progress on five anomalous X-ray pulsars based on a 10-year long monitoring project done using the Rossi X-Ray Timing Explorer (RXTE). In particular, we discuss timing behavior including glitches, radiative variability including bursts, pulsed flux changes, and pulse profile changes. We compare the timing properties to those of regular rotation-powered pulsars, and we consider the observed radiative phenomena in the context of the magnetar model.