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

被引:49
作者
Abbasi, R. [1 ]
Abdou, Y. [2 ]
Ackermann, M. [3 ]
Adams, J. [4 ]
Aguilar, J. [1 ]
Ahlers, M. [5 ]
Andeen, K. [1 ]
Auffenberg, J. [6 ,8 ]
Bai, X. [7 ]
Baker, M. [1 ]
Barwick, S. W. [9 ]
Bay, R. [10 ]
Alba, J. L. Bazo [3 ]
Beattie, K. [11 ]
Beatty, J. J. [12 ,13 ,39 ]
Bechet, S. [14 ]
Becker, J. K. [15 ]
Becker, K. -H. [6 ]
Benabderrahmane, M. L. [3 ]
Berdermann, J. [3 ]
Berghaus, P. [1 ]
Berley, D. [16 ]
Bernardini, E. [3 ]
Bertrand, D. [14 ]
Besson, D. Z. [17 ]
Bissok, M. [18 ]
Blaufuss, E. [16 ]
Boersma, D. J. [1 ]
Bohm, C. [19 ,40 ]
Bolmont, J. [3 ]
Boeser, S. [3 ]
Botner, O. [20 ]
Bradley, L. [21 ]
Braun, J. [1 ]
Breder, D. [6 ]
Castermans, T. [22 ]
Chirkin, D. [1 ]
Christy, B. [16 ]
Clem, J. [7 ,8 ]
Cohen, S. [23 ]
Cowen, D. F. [21 ,24 ]
D'Agostino, M. V. [10 ]
Danninger, M. [19 ,40 ]
Day, C. T. [11 ]
De Clercq, C. [25 ]
Demiroers, L. [23 ]
Depaepe, O. [25 ]
Descamps, F. [2 ]
Desiati, P. [1 ]
de Vries-Uiterweerd, G. [2 ]
机构
[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[2] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium
[3] DESY, D-15735 Zeuthen, Germany
[4] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand
[5] Univ Oxford, Dept Phys, Oxford OX1 3NP, England
[6] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany
[7] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
[8] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[9] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[10] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[11] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[12] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[13] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[14] Univ Libre Bruxelles, Fac Sci, B-1050 Brussels, Belgium
[15] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany
[16] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[17] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA
[18] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[19] Stockholm Univ, Oskar Klein Ctr, SE-10691 Stockholm, Sweden
[20] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden
[21] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[22] Univ Mons, B-7000 Mons, Belgium
[23] Ecole Polytech Fed Lausanne, High Energy Phys Lab, CH-1015 Lausanne, Switzerland
[24] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[25] Vrije Univ Brussels, Dienst ELEM, B-1050 Brussels, Belgium
[26] Univ Utrecht, SRON, Dept Phys & Astron, NL-3584 CC Utrecht, Netherlands
[27] Clark Atlanta Univ, CTSPS, Atlanta, GA 30314 USA
[28] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA
[29] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[30] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
[31] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
[32] Max Planck Inst Kernphys, D-69177 Heidelberg, Germany
[33] Chiba Univ, Dept Phys, Chiba 2638522, Japan
[34] Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA
[35] Univ Alaska, Dept Phys & Astron, Anchorage, AK 99508 USA
[36] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[37] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[38] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA
[39] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
[40] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden
[41] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany
[42] Kalmar Univ, Sch Pure & Appl Nat Sci, S-39182 Kalmar, Sweden
来源
ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 701卷 / 01期
基金
美国国家科学基金会; 瑞典研究理事会;
关键词
acceleration of particles; cosmic rays; neutrinos; HIGH-ENERGY NEUTRINOS; GAMMA-RAYS; TELESCOPES; ASTRONOMY;
D O I
10.1088/0004-637X/701/1/L47
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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(-2) spectrum is E(2) Phi(v mu) < 1.4 x 10(-11) TeV cm(-2) s(-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.
引用
收藏
页码:L47 / L51
页数:5
相关论文
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