Fig. 1.
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Distribution of GRB follow-ups performed with H.E.S.S. between 2004 and 2019. A total of 89 GRBs are considered in the analysis, classified as either well-localised (loc, typically Swift/BAT alerts with position uncertainty ≲3′) or poorly localised (un-loc, mostly Fermi/GBM alerts with uncertainty ≳0.2°) as detailed in Sect. 3.1.
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