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Abstract: IceTop is an air shower array that is part of the IceCube Observatorycurrently under construction at the geographic South Pole. When completed, itwill consist of 80 stations covering an area of 1 km2. Previous analyzes donewith IceTop studied the events that triggered five or more stations, leading toan effective energy threshold of about 0.5 PeV. The goal of this study is topush this threshold lower, into the region where it will overlap with directmeasurements of cosmic rays which currently have an upper limit around300TeV.We select showers that trigger exactly three or exactly four adjacentsurface stations that are not on the periphery of the detector containedevents. This extends the energy threshold down to 150TeV.



Autor: Bakhtiyar Ruzybayev, Shahid Hussain, Chen Xu, Thomas Gaisser

Fuente: https://arxiv.org/







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