Determining the nature of the quasi-pointlike TeV source HESS J1858+020

Details Determining the nature of the quasi-pointlike TeV source HESS J1858+020 Determining the nature of the quasi-pointlike TeV source HESS J1858+020

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2397t&link_type=abstract

Chandra Proposal ID #09500556

Computer Science

Chandra Proposal Id #09500556

Scientific paper

Most HESS sources are very extended objects for which counterparts are difficult to find. But all point like or quasi point like objects have rich X-ray counterparts. In particular, HESS J1813-178 has revealed a bright X-ray nebula enclosed in a radio shell. Recent Chandra observations have resolved a very energetic pulsar candidate in this nebula. We propose to observe the newly discovered quasi point like source HESS J1858+020, which is devoid of any X-ray observations. Its TeV spectral characteristics are very similar to those of HESS J1813-178, reminding a possible young pulsar wind nebula. We propose to test this hypothesis using a 30 ks ACIS-I pointing which should be able to reveal a pulsar wind nebula or on the contrary a possible compact source origin of the emission.

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