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Table 1

H.E.S.S. data and analysis results.

Data set MJD ⟨ Z ⟩a Live time Onb Offc γ Sd
(°) (hours) (counts) (counts) (counts) [σ]

All data 54 910–54 950 22 15.8 823 5750 248 9.2
4 Tel. 54 910–54 918 23 6.7 447 3172 159 8.2

Notes.The first row gives all data taken in stereoscopic mode (i.e., 2 telescopes taking data). The second row gives the subset where all 4 telescopes were operational.


The time-weighted average zenith angle.


Signal + background events around the source position.


Background events from off-source region.


The statistical significance in standard deviations.

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