Searches for extended and point-like neutrino sources with four years of IceCube data

Journal Article · Sun Nov 30 23:00:00 EST 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/796/2/109· OSTI ID:22370152

Aartsen, M. G. ^[1]; Ackermann, M.; Berghaus, P. ^[2]; Adams, J. ^[3]; Aguilar, J. A. ^[4]; Ahlers, M.; Arguelles, C.; BenZvi, S. ^[5]; Ahrens, M. ^[6]; Altmann, D. ^[7]; Anderson, T.; Arlen, T. C. ^[8]; Auffenberg, J. ^[9]; Bai, X. ^[10]; Barwick, S. W. ^[11]; Baum, V. ^[12]; Beatty, J. J. ^[13]; Tjus, J. Becker ^[14]; Becker, K. -H. ^[15]; Berley, D. ^[16] ; others, and

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1. School of Chemistry and Physics, University of Adelaide, Adelaide SA, 5005 Australia (Australia)
2. DESY, D-15735 Zeuthen (Germany)
3. Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch (New Zealand)
4. Département de physique Nucléaire et Corpusculaire, Université de Genève, CH-1211 Genève (Switzerland)
5. Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706 (United States)
6. Oskar Klein Centre and Department of Physics, Stockholm University, SE-10691 Stockholm (Sweden)
7. Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen (Germany)
8. Department of Physics, Pennsylvania State University, University Park, PA 16802 (United States)
9. III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen (Germany)
10. Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701 (United States)
11. Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States)
12. Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz (Germany)
13. Department of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210 (United States)
14. Fakultät für Physik and Astronomie, Ruhr-Universität Bochum, D-44780 Bochum (Germany)
15. Department of Physics, University of Wuppertal, D-42119 Wuppertal (Germany)
16. Department of Physics, University of Maryland, College Park, MD 20742 (United States)

We present results on searches for point-like sources of neutrinos using four years of IceCube data, including the first year of data from the completed 86 string detector. The total livetime of the combined data set is 1373 days. For an E {sup –2} spectrum, the observed 90% C.L. flux upper limits are ∼10{sup –12} TeV{sup –1} cm{sup –2} s{sup –1} for energies between 1 TeV and 1 PeV in the northern sky and ∼10{sup –11} TeV{sup –1} cm{sup –2} s{sup –1} for energies between 100 TeV and 100 PeV in the southern sky. This represents a 40% improvement compared to previous publications, resulting from both the additional year of data and the introduction of improved reconstructions. In addition, we present the first results from an all-sky search for extended sources of neutrinos. We update the results of searches for neutrino emission from stacked catalogs of sources and test five new catalogs; two of Galactic supernova remnants and three of active galactic nuclei. In all cases, the data are compatible with the background-only hypothesis, and upper limits on the flux of muon neutrinos are reported for the sources considered.

• OSTI ID: 22370152
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 796; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
CATALOGS
EMISSION
GALAXIES
GALAXY CLUSTERS
GALAXY NUCLEI
MUON NEUTRINOS
PEV RANGE
SPECTRA
SUPERNOVA REMNANTS
TEV RANGE