Discovery of very-high-energy γ-ray emission from the vicinity of PSR J1913+1011 with HESS
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Date
2008
Authors
Aharonian, F.
Akhperjanian, A.
Barres de Almaida, U.
Bazer-Bachi, A.
Behera, B.
Beilicke, M.
Benbow, W.
Bernlohr, K.
Boisson, C.
Bolz, O.
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Journal article
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Astronomy and Astrophysics: a European journal, 2008; 484(2):435-440
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F. Aharonian ... G. Rowell ... et al.
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Abstract
The HESS experiment, an array of four Imaging Atmospheric Cherenkov Telescopes with high sensitivity and large field-of-view, has been used to search for emitters of very-high-energy (VHE, >100 GeV) γ-rays along the Galactic plane, covering the region 30° < l < 60°, 280° < l < 330°, and −3° < b < 3°. In this continuation of the HESS Galactic Plane Scan, a new extended VHE γ-ray source was discovered at α2000=19h12m49s, δ2000=+10◦09°06'' (HESS J1912+101). Its integral flux between 1–10 TeV is ∼10% of the Crab Nebula flux in the same energy range. The measured energy spectrum can be described by a power law dN/dE ∼ E−Γ with a photon index Γ = 2.7 ± 0.2stat ± 0.3sys. HESS J1912+101 is plausibly associated with the high spin-down luminosity pulsar PSR J1913+1011. We also discuss associations with an as yet unconfirmed SNR candidate proposed from low frequency radio observation and/or with molecular clouds found in ¹³CO data.
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© ESO 2008. Article published by EDP Sciences