Search for Point Sources of High Energy Neutrinos with AMANDA
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چکیده
This paper describes the search for astronomical sources of high-energy neutrinos using the AMANDA-B10 detector, an array of 302 photomultiplier tubes, used for the detection of Cherenkov light from upward traveling neutrino-induced muons, buried deep in ice at the South Pole. The absolute pointing accuracy and angular resolution were studied by using coincident events between the AMANDA detector and two independent telescopes on the surface, the GASP air Cherenkov telescope and the SPASE extensive air shower array. Using data collected from April to October of 1997 (130.1 days of livetime), a general survey of the northern hemisphere revealed no statistically significant excess of events from any direction. The sensitivity for a flux of muon neutrinos is based on the effective detection area for through-going muons. Averaged over the Northern sky, the effective detection area exceeds 10,000 m for Eμ ≈ 10 TeV. Neutrinos generated in the atmosphere by cosmic ray interactions were used to verify the predicted performance of the detector. For a source with a differential energy spectrum proportional to E−2 ν and declination larger than +40 ◦, we obtain E(dNν/dE) ≤ 10−6 GeVcm−2s−1 for an energy threshold of 10 GeV. Bartol Research Institute, University of Delaware, Newark, DE 19716, USA DESY-Zeuthen,D-15735, Zeuthen, Germany Dept. of Technology, University of Kalmar, S-39182, Kalmar, Sweden Fysikum, Stockholm University, S-11385, Stockholm, Sweden Dept. of Physics, University of California, Berkeley, CA 94720 USA Dept. of Physics and Astronomy, University of California, Irvine, CA 92697 USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802 USA Dept. of Physics, University of Wisconsin, Madison, WI 53706 USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Universite Libre de Bruxelles, Science Faculty CP230, Boulevard du Triomphe, B-1050, Brussels, Belgium Division of High Energy Physics, Uppsala University, S-75121, Uppsala, Sweden Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099, Mainz, Germany Fachbereich 8 Physik, BUGH Wuppertal, D-42097 Wuppertal Germany Physics Dept., University of Wisconsin, River Falls, WI 54022 USA Vrije Universiteit Brussel, Dienst ELEM, B-1050, Brussels, Belgium University of Mons-Hainaut, Mons, Belgium Dept. F́ısica, University Simón Boĺıvar, Caracas, Venezuela Present address: CERN, CH-1211, Geneve 23, Switzerland Present address: Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723, USA Present address: Optical Networks Research, JDS Uniphase, 100 Willowbrook Rd., Freehold, NJ 07728-2879, USA
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تاریخ انتشار 2002