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ASTROPHYSICAL JOURNAL
Volume 938, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac8f41
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Super-Kamiokande has been continuously searching for neutrino bursts characteristic of core-collapse supernovae since 1996. This study focuses on detecting more distant supernovae using an offline approach. The analysis of data collected from 2008 to 2018 found no evidence of distant supernova bursts, setting an upper limit on the rate of core-collapse supernovae out to 100 kpc at 90% confidence level.
Super-Kamiokande has been searching for neutrino bursts characteristic of core-collapse supernovae continuously, in real time, since the start of operations in 1996. The present work focuses on detecting more distant supernovae whose event rate may be too small to trigger in real time, but may be identified using an offline approach. The analysis of data collected from 2008 to 2018 found no evidence of distant supernovae bursts. This establishes an upper limit of 0.29 yr(-1) on the rate of core-collapse supernovae out to 100 kpc at 90% C.L. For supernovae that fail to explode and collapse directly to black holes the limit reaches to 300 kpc.
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