Low-Multiplicity Burst Search At The Sudbury Neutrino Observatory

Aharmim, B.
Ahmed, S. N.
Anthony, A. E.
Barros, N.
Beier, E. W.
Bellerive, A.
Beltran, B.
Bergevin, M.
Biller, S. D.
Boudjemline, K.
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Results are reported from a search for low-multiplicity neutrino bursts in the Sudbury Neutrino Observatory. Such bursts could indicate the detection of a nearby core-collapse supernova explosion. The data were taken from Phase I (1999 November-2001 May), when the detector was filled with heavy water, and Phase II (2001 July-2003 August), when NaCl was added to the target. The search was a blind analysis in which the potential backgrounds were estimated and analysis cuts were developed to eliminate such backgrounds with 90% confidence before the data were examined. The search maintained a greater than 50% detection probability for standard supernovae occurring at a distance of up to 60 kpc for Phase I and up to 70 kpc for Phase II. No low-multiplicity bursts were observed during the data-taking period.

Aharmim, B., S. N. Ahmed, A. E. Anthony, N. Barros, E. W. Beier, A. Bellerive, B. Beltran et al. "Low-multiplicity burst search at the Sudbury Neutrino Observatory." The Astrophysical Journal, Vol. 728, No. 2 (Feb., 2011): 83.