Chandra observations of the anomalous X-ray pulsar 1E 2259+586

We present X-ray imaging, timing, and phase-resolved spectroscopy of the anomalous X-ray pulsar 1E 2259+586 using the Chandra X-Ray Observatory. The spectrum is well described by a power-law plus blackbody model with Gamma = 3.6(1), kT(BB) = 0.412(6) keV, and N-H = 0.93(3) x 10(22) cm(-2); we find no evidence for spectral features (0.5-7.0 keV). We derive a new, precise X-ray position for the source and determine its spin period, P = 6.978977(24) s. Time-resolved X-ray spectra show no significant variation as a function of pulse phase. We have detected excess emission beyond 4 from the central source extending to beyond 100, due to the supernova remnant and possibly dust scattering from the interstellar medium.