The results of follow-up observations of the TeV γ-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 Γ = 2.11 ± 0.09stat ± 0.10sys, and a cut-off energy of 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 γ-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 WpnH ∼ 4 × 1052(d/10kpc)2 erg cm−3.
HESS J1640−465 – an exceptionally luminous TeV γ-ray supernova remnant
- A. Abramowski et al. (H.E.S.S. Collaboration)
- Monthly Notices of the Royal Astronomical Society 439, 2828 (2014)
- 2014
Abstract
Auxiliary informations
Spectrum Points (corresponding to Fig. 2)
| E(TeV) | dE+(TeV) | dE-(TeV) | Flux(cm-2 s-1 TeV-1) | dFlux+(cm-2 s-1 TeV-1) | dFlux-(cm-2 s-1 TeV-1) |
|---|---|---|---|---|---|
| 2.903e-01 | 2.592e-02 | 2.930e-02 | 3.956e-11 | 1.790e-11 | 1.678e-11 |
| 3.510e-01 | 3.207e-02 | 3.482e-02 | 2.997e-11 | 5.278e-12 | 5.104e-12 |
| 4.237e-01 | 4.044e-02 | 4.060e-02 | 2.430e-11 | 2.785e-12 | 2.709e-12 |
| 5.104e-01 | 5.191e-02 | 4.627e-02 | 1.335e-11 | 1.485e-12 | 1.444e-12 |
| 6.206e-01 | 6.071e-02 | 5.824e-02 | 9.179e-12 | 9.511e-13 | 9.240e-13 |
| 7.497e-01 | 7.566e-02 | 6.845e-02 | 7.078e-12 | 6.318e-13 | 6.133e-13 |
| 9.081e-01 | 9.188e-02 | 8.272e-02 | 4.240e-12 | 3.933e-13 | 3.813e-13 |
| 1.102e+00 | 1.091e-01 | 1.024e-01 | 2.684e-12 | 2.587e-13 | 2.502e-13 |
| 1.334e+00 | 1.336e-01 | 1.227e-01 | 1.955e-12 | 1.773e-13 | 1.713e-13 |
| 1.616e+00 | 1.626e-01 | 1.478e-01 | 1.098e-12 | 1.167e-13 | 1.125e-13 |
| 1.955e+00 | 1.995e-01 | 1.766e-01 | 6.519e-13 | 7.841e-14 | 7.533e-14 |
| 2.368e+00 | 2.418e-01 | 2.139e-01 | 3.197e-13 | 5.055e-14 | 4.823e-14 |
| 2.868e+00 | 2.941e-01 | 2.580e-01 | 2.864e-13 | 3.785e-14 | 3.607e-14 |
| 3.473e+00 | 3.578e-01 | 3.111e-01 | 1.677e-13 | 2.612e-14 | 2.474e-14 |
| 4.205e+00 | 4.361e-01 | 3.743e-01 | 9.348e-14 | 1.809e-14 | 1.699e-14 |
| 5.092e+00 | 5.313e-01 | 4.505e-01 | 4.709e-14 | 1.167e-14 | 1.077e-14 |
| 6.169e+00 | 6.438e-01 | 5.457e-01 | 2.781e-14 | 8.042e-15 | 7.319e-15 |
| 7.471e+00 | 7.831e-01 | 6.581e-01 | 2.180e-14 | 6.145e-15 | 5.569e-15 |
| 9.774e+00 | 2.341e+00 | 1.520e+00 | 5.728e-15 | 2.304e-15 | 2.098e-15 |
| 1.591e+01 | 7.495e+01 | 3.791e+00 | 2.301e-15 | 0 (upper limit) | |
