Extending the Search for Neutrino Point Sources with IceCube above the Horizon

被引：31

作者：

Abbasi, R. ^{[29
]}

Abdou, Y. ^{[23
]}

Abu-Zayyad, T. ^{[35
]}

Adams, J. ^{[17
]}

Aguilar, J. A. ^{[29
]}

Ahlers, M. ^{[34
]}

Andeen, K. ^{[29
]}

Auffenberg, J. ^{[42
]}

Bai, X. ^{[32
,33
]}

Baker, M. ^{[29
]}

Barwick, S. W. ^{[25
]}

Bay, R. ^{[9
]}

Alba, J. L. Bazo ^{[1
]}

Beattie, K. ^{[10
]}

Beatty, J. J. ^{[19
,20
,21
]}

Bechet, S. ^{[14
]}

Becker, J. K. ^{[12
]}

Becker, K. -H. ^{[42
]}

Benabderrahmane, M. L. ^{[1
]}

Berdermann, J. ^{[1
]}

Berghaus, P. ^{[1
,29
]}

Berley, D. ^{[18
]}

Bernardini, E. ^{[1
]}

Bertrand, D. ^{[14
]}

Besson, D. Z. ^{[27
]}

Bissok, M. ^{[2
]}

Blaufuss, E. ^{[18
]}

Boersma, D. J. ^{[2
]}

Bohm, C. ^{[36
,37
]}

Botner, O. ^{[40
]}

Bradley, L. ^{[39
]}

Braun, J. ^{[29
]}

Breder, D. ^{[42
]}

Carson, M. ^{[23
]}

Castermans, T. ^{[31
]}

Chirkin, D. ^{[29
]}

Christy, B. ^{[18
]}

Clem, J. ^{[32
,33
]}

Cohen, S. ^{[26
]}

Cowen, D. F. ^{[38
,39
]}

D'Agostino, M. V. ^{[9
]}

Danninger, M. ^{[36
,37
]}

Day, C. T. ^{[10
]}

De Clercq, C. ^{[15
]}

Demirors, L. ^{[26
]}

Depaepe, O. ^{[15
]}

Descamps, F. ^{[23
]}

Desiati, P. ^{[29
]}

de Vries-Uiterweerd, G. ^{[23
]}

DeYoung, T. ^{[39
]}

机构：

[1] DESY, D-15735 Zeuthen, Germany

[2] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[3] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[4] Univ Alaska Anchorage, Dept Phys & Astron, Anchorage, AK 99508 USA

[5] Clark Atlanta Univ, CTSPS, Atlanta, GA 30314 USA

[6] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

[7] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA

[8] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA

[9] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[10] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[11] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[12] Ruhr Univ Bochum, Fak Phys & Astron, D-44780 Bochum, Germany

[13] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[14] Univ Libre Bruxelles, Fac Sci, B-1050 Brussels, Belgium

[15] Vrije Univ Brussel, Dienst ELEM, B-1050 Brussels, Belgium

[16] Chiba Univ, Dept Phys, Chiba 2638522, Japan

[17] Univ Canterbury, Dept Phys & Astron, Christchurch 1, New Zealand

[18] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[19] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[20] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[21] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[22] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany

[23] Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium

[24] Max Planck Inst Kernphys, D-69177 Heidelberg, Germany

[25] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[26] Ecole Polytech Fed Lausanne, High Energy Phys Lab, CH-1015 Lausanne, Switzerland

[27] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

[28] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[29] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[30] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[31] Univ Mons, B-7000 Mons, Belgium

[32] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[33] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[34] Univ Oxford, Dept Phys, Oxford OX1 3NP, England

[35] Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA

[36] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[37] Stockholm Univ, Oskar Klein Ctr, SE-10691 Stockholm, Sweden

[38] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[39] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[40] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden

[41] Univ Utrecht, SRON, Dept Phys & Astron, NL-3584 CC Utrecht, Netherlands

[42] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany

[43] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

[44] Kalmar Univ, Sch Pure & Appl Nat Sci, S-39182 Kalmar, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 22期

基金：

美国国家科学基金会; 瑞典研究理事会;

关键词：

RAYS;

D O I：

10.1103/PhysRevLett.103.221102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Point source searches with the IceCube neutrino telescope have been restricted to one hemisphere, due to the exclusive selection of upward going events as a way of rejecting the atmospheric muon background. We show that the region above the horizon can be included by suppressing the background through energy-sensitive cuts. This improves the sensitivity above PeV energies, previously not accessible for declinations of more than a few degrees below the horizon due to the absorption of neutrinos in Earth. We present results based on data collected with 22 strings of IceCube, extending its field of view and energy reach for point source searches. No significant excess above the atmospheric background is observed in a sky scan and in tests of source candidates. Upper limits are reported, which for the first time cover point sources in the southern sky up to EeV energies.

引用

页数：6

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