The nature of the gamma-ray source HESS J1826-148

Details The nature of the gamma-ray source HESS J1826-148 The nature of the gamma-ray source HESS J1826-148

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1860f&link_type=abstract

Chandra Proposal ID #06408205

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Chandra Proposal Id #06408205

Scientific paper

We (the HESS collaboration) used the first year of operation of the HESS TeV array to conduct a survey of the inner galaxy. More than a dozen new and unidentified sources have been discovered (Aharonian et al., Science, in press). Only one of them, HESS J1826-148, is not extended and was found to be variable, and should be associated with a compact object. The TeV source is close to microquasar LS5039, but the nominal separation of 50" is compatible with a spatial association on a 9% basis only. Simultaneous XTE-ASM measurements during TeV observations were uncorrelated. It is plausible that HESS J1826-148 is actually not coincident with LS5039, but with another compact, possibly long-lived transient source, which would in any case be the first example of a new class of TeV emitting sources. We propose DDT for 8 epochs of simultaneous Chandra & HESS observations to search for a spatially coincident, hard X-ray source with correlated variability patterns to enable unambiguous ident.

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