What question did this study set out to answer?

To explore the potential detection of a neutrino signal coinciding with the gamma ray burst GRB990705.

March 5, 2026Open Access

GRB990705: a Detectable Neutrino Source?

Key Points

To explore the potential detection of a neutrino signal coinciding with the gamma ray burst GRB990705.
Used the LVD neutrino telescope located in the Gran Sasso Underground Laboratories
Examined neutrino signals for correlation with GRB timing
Set upper limits on the nuebar flux cross-section product based on findings
No neutrino signals were detected either simultaneously or preceding the gamma ray burst.
Upper limits on the nuebar flux were established under the assumption of thermal nuebar spectra.

Abstract

The detection of the Gamma Ray Burst GRB990705 on July 5th 1999,pointing to the Large Magellanic Clouds, suggested the search for the possible existence of a neutrino signal, either in coincidence or preceding the photon burst. We investigated this possibility by mean of the LVD neutrino telescope at the Gran Sasso Underground Laboratories. No evidence of a neutrino signal either simultaneous or preceding the GRB has been found, hence we set upper limits on the nuebar flux cross-section product. Assuming thermal nuebar spectra, the results are expressed in terms of limits on the nuebar flux for different spectral temperatures.

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