Details

Autor(en) / Beteiligte

• Abbasi, R.
• Aguilar, J.
• Andeen, K.
• Baker, M.
• Abdou, Y.
• Ackermann, M.
• Bazo Alba, J. L.
• Benabderrahmane, M. L.
• Berdermann, J.
• Adams, J.
• Ahlers, M.
• Auffenberg, J.
• Becker, K.-H.
• Bai, X.
• Barwick, S. W.
• Bay, R.
• Beattie, K.
• Beatty, J. J.
• Bechet, S.
• Becker, J. K.

Titel

FIRST NEUTRINO POINT-SOURCE RESULTS FROM THE 22 STRING ICECUBE DETECTOR

Ist Teil von

• The Astrophysical journal, 2009-08, Vol.701 (1)

Ort / Verlag

United States

Erscheinungsjahr

2009

Link zum Volltext

Quelle

EZB*

Beschreibungen/Notizen

• We present new results of searches for neutrino point sources in the northern sky, using data recorded in 2007-2008 with 22 strings of the IceCube detector (approximately one-fourth of the planned total) and 275.7 days of live time. The final sample of 5114 neutrino candidate events agrees well with the expected background of atmospheric muon neutrinos and a small component of atmospheric muons. No evidence of a point source is found, with the most significant excess of events in the sky at 2.2{sigma} after accounting for all trials. The average upper limit over the northern sky for point sources of muon-neutrinos with E {sup -2} spectrum is E{sup 2} {phi}{sub {nu}{sub {mu}}}< 1.4 x 10{sup -11} TeV cm{sup -2} s{sup -1}, in the energy range from 3 TeV to 3 PeV, improving the previous best average upper limit by the AMANDA-II detector by a factor of 2.