The unidentified source HESS J1702-420 and the possible nebula of PSR J1702-4128

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Hess J1702-420, Xmm-Newton Proposal 05064101

Scientific paper

We propose XMM-Newton observations to examine the nature of the unidentified VHE gamma-ray source HESS J1702-420. The VHE morphology shows a tail towards PSR J1702-4128, and we propose deeper X-ray observations of a field containing this pulsar to confirm if it exhibits an asymmetric X-ray nebula, for which there is some evidence in archival ASCA data. If so, this would be the oldest and least energetic pulsar yet found to power a VHE and X-ray nebula. The proposed exposure should also allow a confirmation of the more localised excess seen at the pulsar position with Chandra. Finally, the proposed observation would also more than triple the XMM-Newton exposure on G344.7-0.1, a supernova remnant which shows some evidence of containing a plerionic component.

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