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Time-Dependent Searches for Point Sources of Neutrinos with the 4O-String and 22-String Configurations of IceCubeThis paper presents four searches for flaring sources of neutrinos using the IceCube neutrino telescope. For the first time, a search is performed over the entire parameter space of energy, direction, and time with sensitivity to neutrino flares lasting between 20 micro-s and a year duration from astrophysical sources. Searches that integrate over time are less sensitive to flares because they are affected by a larger background of atmospheric neutrinos and muons that can be reduced by the use of additional timing information. Flaring sources considered here, such as active galactic nuclei, soft gamma-ray repeaters, and gamma-ray bursts, are promising candidate neutrino emitters. Two searches are "untriggered" in the sense that they look for any possible flare in the entire sky and from a predefined catalog of sources from which photon flares have been recorded. The other two searches are triggered by multi-wavelength information on flares from blazars and from a soft gamma-ray repeater. One triggered search uses lightcurves from Fermi-LAT which provides continuous monitoring. A second triggered search uses information where the flux states have been measured only for short periods of time near the flares. The untriggered searches use data taken by 40 strings of IceCube between 2008 April 5 and 2009 May 20. The triggered searches also use data taken by the 22-string configuration of IceCube operating between 2007 May 31 and 2008 April 5. The results from all four searches are compatible with a fluctuation of the background.
Document ID
20120015706
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Abbasi, R.
(Wisconsin Univ. Madison, WI, United States)
Abdou, Y.
(Ghent Univ. Belgium)
Abu-Zayyad, T.
(Wisconsin Univ. River Falls, WI, United States)
Adams, J.
(Canterbury Univ. Christchurch, New Zealand)
Aguilar, J. A.
(Wisconsin Univ. Madison, WI, United States)
Ahlers, M.
(Oxford Univ. Oxford, United Kingdom)
Andeen, K.
(Wisconsin Univ. Madison, WI, United States)
Auffenberg, J.
(Wuppertal Univ. Germany)
Bai, X.
(Delaware Univ. Newark, DE, United States)
Baker, M.
(Wisconsin Univ. Madison, WI, United States)
Barwick, S. W.
(California Univ. Irvine, CA, United States)
Bay, R.
(California Univ. Berkeley, CA, United States)
Bazo Alba, J. L.
(Deutsches Elektronen-Synchrotron Zeuthen, Germany)
Beattie, K.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Beatty, J. J.
(Ohio State Univ. Columbus, OH, United States)
Bechet, S.
(Universite Libre de Bruxelles Brussels, Belgium)
Becker, J. K.
(Bochum Univ. Germany)
Becker, K. H.
(Wuppertal Univ. Germany)
Benabderrahmane, M. L.
(Deutsches Elektronen-Synchrotron Zeuthen, Germany)
Benzvi, S.
(Wisconsin Univ. Madison, WI, United States)
Berdermann, J.
(Deutsches Elektronen-Synchrotron Zeuthen, Germany)
Berghaus, P.
(Wisconsin Univ. Madison, WI, United States)
Berley, D.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Stamatikos, M.
(Ohio State Univ. Columbus, OH, United States)
Bernardini, E.
(Deutsches Elektronen-Synchrotron Zeuthen, Germany)
Date Acquired
August 26, 2013
Publication Date
January 1, 2012
Publication Information
Publication: The Astrophysical Journal
Publisher: American Astronomical Society
Volume: 744
Issue: 1
Subject Category
Astronomy
Report/Patent Number
GSFC.JA.7138.2012
Distribution Limits
Public
Copyright
Other

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