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SEARCH FOR TIME-INDEPENDENT NEUTRINO EMISSION FROM ASTROPHYSICAL SOURCES WITH 3 yr OF IceCube DATA
- Source :
- ASTROPHYSICAL JOURNAL, Astrophysical Journal, The astrophysical journal 779(2), 132 (2013). doi:10.1088/0004-637X/779/2/132, Astrophysical Journal, Vol. 779, No 2 (2013) P. 17
- Publication Year :
- 2013
- Publisher :
- American Astronomical Society, 2013.
-
Abstract
- We present the results of a search for neutrino point sources using the IceCube data collected between April 2008 and May 2011 with three partially completed configurations of the detector: the 40-, 59- and 79-string configurations. The live-time of this data set are 1,040 days. An unbinned maximum likelihood ratio test was used to search for an excess of neutrinos above the atmospheric background at any given direction in the sky. By adding two more years of data with improved event selection and reconstruction techniques, the sensitivity was improved by a factor 3.5 or more with respect to the previously published results obtained with the 40-string configuration of IceCube. We performed an all-sky survey and a dedicated search using a catalog of \textit{a priori} selected objects observed by other telescopes. In both searches, the data are compatible with the background-only hypothesis. In the absence of evidence for a signal, we set upper limits on the flux of muon neutrinos. For an E$^{-2}$ neutrino spectrum, the observed limits are between 0.9 and $23.2\times 10^{-12}$ TeV$^{-1}$ cm$^{-2}$s$^{-1}$. We also report upper limits for neutrino emission from groups of sources which were selected according to theoretical models or observational parameters and analysed with a stacking approach.<br />41 pages, 26 figures, submitted to ApJ
- Subjects :
- HIGH-ENERGY NEUTRINOS
Astrophysics::High Energy Astrophysical Phenomena
media_common.quotation_subject
FOS: Physical sciences
Flux
ddc:500.2
Astrophysics
7. Clean energy
01 natural sciences
IceCube
Set (abstract data type)
cosmic rays
0103 physical sciences
BRIGHT GALAXY SAMPLE
astroparticle physics
neutrinos
telescopes
Sensitivity (control systems)
010303 astronomy & astrophysics
media_common
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
SUPERNOVA-REMNANTS
Muon
010308 nuclear & particles physics
Detector
STARBURST GALAXIES
Astronomy and Astrophysics
COSMIC-RAYS
CRAB-NEBULA
Data set
Neutrinos, Telescopes
Physics and Astronomy
13. Climate action
Space and Planetary Science
Sky
GALACTIC SOURCES
MOLECULAR CLOUDS
ddc:520
High Energy Physics::Experiment
Neutrino
Astrophysics - High Energy Astrophysical Phenomena
GAMMA-RAY EMISSION
FERMI-LAT DISCOVERY
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 779
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....4e514911f22decc9236c60450e7f9878
- Full Text :
- https://doi.org/10.1088/0004-637x/779/2/132