A deep search for the optical counterpart to the anomalous X-ray pulsar 1E 2259+58.6

F. Hulleman, M. H. van Kerkwijk, F. W. M. Verbunt +1

We present Keck R and I band images of the field of the anomalous X-ray pulsar 1E 2259+58.6. We derive an improved X-ray position from archival ROSAT HRI observations by correcting…