Search for Supernova Neutrino Bursts at Super-Kamiokande
| Autor: | Yoshihisa Obayashi, Masayuki Nakahata, Haruki Nishino, Katsuki Hiraide, Steven Dazeley, Christopher Walter, Takuya Hasegawa, Takashi Iida, Yoichiro Suzuki, Eric Thrane, Masashi Yokoyama, Kate Scholberg, Yoshinari Hayato, Jennifer Raaf, Edward Kearns, Joanna Zalipska, Andrew Stachyra, Alec Habig, Richard Jeffrey Wilkes, Byeongsu Yang, Mark Vagins, Yuichi Oyama |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Galaxy High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) Supernova Space and Planetary Science High Energy Physics::Experiment Neutrino Super-Kamiokande Astrophysics::Galaxy Astrophysics |
| Popis: | The result of a search for neutrino bursts from supernova explosions using the Super-Kamiokande detector is reported. Super-Kamiokande is sensitive to core-collapse supernova explosions via observation of their neutrino emissions. The expected number of events comprising such a burst is ~10^4 and the average energy of the neutrinos is in few tens of MeV range in the case of a core-collapse supernova explosion at the typical distance in our galaxy (10 kiloparsecs); this large signal means that the detection efficiency anywhere within our galaxy and well past the Magellanic Clouds is 100%. We examined a data set which was taken from May, 1996 to July, 2001 and from December, 2002 to October, 2005 corresponding to 2589.2 live days. However, there is no evidence of such a supernova explosion during the data-taking period. The 90% C.L. upper limit on the rate of core-collapse supernova explosions out to distances of 100 kiloparsecs is found to be 0.32 SN/year. 7 pages, 6 figures |
| Databáze: | OpenAIRE |
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