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

Abstract:

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 Γ= 3.6 (1), kT BB= 0.412 (6) keV, and N H= 0.93 (3)× 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 &arcsec; from the central source extending to beyond 100 &arcsec;, due to the supernova remnant and possibly dust scattering from the interstellar medium.

Año de publicación:

2001

Keywords:

Fuente:

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