XMM-Newton Proposal 02023101

Details XMM-Newton Proposal 02023101 XMM-Newton Proposal 02023101

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..123v&link_type=abstract

XMM-Newton Proposal ID #02023101

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Ngc 1904, Xmm-Newton Proposal 02023101

Scientific paper

The radius of neutron stars can be determined from their X-ray spectrum. Quiescent soft X-ray transients are the best candidates for this, provided their interstellar absorption and distance are independently known. We propose to observe such a system, well outside the core of globular cluster NGC 1904, which has extremely low interstellar absorption (E(B-V)0.01), and is not contaminated by nearby other sources. We aim at a better than 10 percent accuracy. This source is also interesting from a dynamical point of view, since it must have been catapulted from the cluster core. As a bonus we observe the core of the cluster. The XMM-Newton source position will enable us to look for an optical counterpart in archival HST/WFPC2 data.

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