Publikationsdatum:
2014-03-21
Beschreibung:
The results of follow-up observations of the TeV -ray source HESS J1640–465 from 2004 to 2011 with the High Energy Stereoscopic System (HESS) are reported in this work. The spectrum is well described by an exponential cut-off power law with photon index = 2.11 ± 0.09 stat ± 0.10 sys , and a cut-off energy of $E_{\rm c} = 6.0^{+2.0}_{-1.2}$ TeV. The TeV emission is significantly extended and overlaps with the northwestern part of the shell of the SNR G338.3–0.0. The new HESS results, a re-analysis of archival XMM–Newton data and multiwavelength observations suggest that a significant part of the -ray emission from HESS J1640–465 originates in the supernova remnant shell. In a hadronic scenario, as suggested by the smooth connection of the GeV and TeV spectra, the product of total proton energy and mean target density could be as high as W p n H ~ 4 10 52 ( d /10kpc) 2 erg cm –3 .
Print ISSN:
0035-8711
Digitale ISSN:
1365-2966
Thema:
Physik