Abstract
It has been hypothesized that large fluxes of neutrinos may be created in astrophysical "cosmic accelerators." The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional clustering that characterizes a distant astrophysical signal. We perform a search for neutrino point sources using the upward-going muon data from three phases of operation (SK-I, SK-II, and SK-III) spanning 2623 days of live time taken from 1996 April 1 to 2007 August 11. The search looks for signals from suspected galactic and extragalactic sources, transient sources, and uncataloged sources. While we find interesting signatures from two objects - RX J1713.7-3946 (97.5% CL) and GRB 991004D (95.3% CL) - these signatures lack compelling statistical significance given trial factors. We set limits on the flux and fluence of neutrino point sources above energies of 1.6 GeV.
Original language | English |
---|---|
Pages (from-to) | 503-512 |
Number of pages | 10 |
Journal | Astrophysical Journal |
Volume | 704 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2009 |
Externally published | Yes |
Keywords
- Galaxies: active
- Gamma rays: bursts
- Neutrinos
- Pulsars: general
- Supernova remnants
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science