The Binary Ms-Pulsar PSR J0218+4232 and its Probable Synchrotron Nebula

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Chandra Proposal Id #01400221

Scientific paper

In a recent 100 ks ROSAT HRI observation of the binary ms-pulsar PSR J0218+4232 we detected a lightcurve with two narrow pulses; the measured width of the main pulse (350 microsec) is compatible with the scatter in the ROSAT clock. About 60% of the emission is unpulsed and can be explained by emission from a compact nebula with diameter ~14'', compatible with available radio data. Only AXAF's HRC-I can disentangle the spatial emission, as well as resolve the narrow structures in the lightcurve; a 75 ks observation suffices. We further propose a spectral study of this ms-pulsar and its probable synchrotron nebula with AXAF's ACIS-I detector (100 ks) in order to investigate the underlying production processes.

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