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Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pcdistance from Earth. Extended very-high-energy gamma-ray emission around thepulsar has been detected by multiple water Cherenkov detector basedinstruments. However, the detection of extended TeV gamma-ray emission aroundthe Geminga pulsar has proven challenging for IACTs due to the angular scaleexceeding the typical field-of-view. By detailed studies of backgroundestimation techniques and characterising systematic effects, a detection ofhighly extended TeV gamma-ray emission could be confirmed by the H.E.S.S. IACTarray. Building on the previously announced detection, in this contribution wefurther characterise the emission and apply an electron diffusion model to thecombined gamma-ray data from the H.E.S.S. and HAWC experiments, as well asX-ray data from XMM-Newton.

Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S