Spatial extent and spectrum of the X-ray DC component of millisecond pulsar PSR B1937+21

Details Spatial extent and spectrum of the X-ray DC component of millisecond pulsar PSR B1937+21 Spatial extent and spectrum of the X-ray DC component of millisecond pulsar PSR B1937+21

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1690m&link_type=abstract

Chandra Proposal ID #06500020

Computer Science

Chandra Proposal Id #06500020

Scientific paper

We propose to observe millisecond pulsar PSR B1937+21 for 50 ks with the ACIS-S in order to obtain a high-resolution X-ray image and an accurate (total) X-ray spectrum. BeppoSAX observations of PSR B1937+21 revealed an unresolved ~40% DC component below 4 keV. In addition, the total spectrum of BeppoSAX appeared to be much softer than the pulsed spectrum. The apparently soft/thermal(?) DC component could not be well constrained, and might be due to emission from a heated polar cap by along the magnetic field back flowing particles, or due to an underlying pulsar wind nebula. With a Chandra ACIS-S observation it is possible to resolve this ambiguity, and significantly better spectral information can be obtained for either interpretation.

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