Detection of extended TeV emission around the Geminga pulsar with H.E.S.S.

• Discussion timeslot (ZOOM-Meeting): 20. July 2021 - 18:00
• ZOOM-Meeting URL: https://desy.zoom.us/j/98542982538
• ZOOM-Meeting ID: 98542982538
• ZOOM-Meeting Passcode: ICRC2021
• Corresponding Session: https://icrc2021-venue.desy.de/channel/53-PWN-and-Halos-GAD-GAI/84
• Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-04/5

Abstract:

'Highly extended gamma-ray emission around the Geminga pulsar was discovered by Milagro and verified by HAWC. Despite many observations with Imaging Atmospheric Cherenkov Telescopes (IACTs), detection of gamma-ray emission on angular scales exceeding the IACT field-of-view has proven challenging. However, recent developments in analysis techniques have enabled the detection of significant emission around Geminga in archival data with H.E.S.S.. rnIn 2019, further data on the Geminga region were obtained with an optimised observation strategy. Following the previous announcement of the detection of significant TeV emission around Geminga in archival data, in this contribution we present the detection with this newly acquired, independent dataset. New analysis results will be presented, and emphasis given to the technical challenges involved in observations of highly extended gamma-ray emission with IACTs.'

• Authors: Alison Mitchell | Sami Caroff | Jim Hinton | Lars Mohrmann | for the HESS collaboration
• Collaboration: H.E.S.S.
• Indico-ID: 174
• Proceeding URL: https://pos.sissa.it/395/780