A Multi-Wavelength Investigation of the Unidentified Gamma-Ray Source HESS J1708-410
Abstract
We report on recent XMM-Newton observations, archival radio continuum and CO data, and spectral energy distribution (SED) modeling of the unidentified Galactic plane source HESS J1708-410. No significant extended X-ray emission is observed, and we place an upper limit of 3.2 × 10-13 erg cm-2 s-1 in the 2-4 keV range for the region of TeV emission. Molonglo Galactic Plane Survey data are used to place an upper limit of 0.27 Jy at 843 MHz for the source, with a 2.4 GHz limit of 0.4 Jy from the Parkes survey of the southern Galactic plane. 12CO (J 1 → 0) data of this region indicates a plausible distance of 3 kpc for HESS J1708-410. SED modeling of both the HESS detection and flux upper limits offer useful constraints on the emission mechanisms, magnetic field, injection spectrum, and ambient medium surrounding this source.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 2009
- DOI:
- 10.1088/0004-637X/707/2/1717
- arXiv:
- arXiv:0911.0700
- Bibcode:
- 2009ApJ...707.1717V
- Keywords:
-
- gamma rays: observations;
- radiation mechanisms: non-thermal;
- X-rays: general;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 16 pages, 5 figures, accepted to The Astrophysical Journal