  A search for high-energy neutrino emission correlated with gamma-ray bursts
outside the electromagnetic prompt-emission time window is presented. Using a
stacking approach of the time delays between reported gamma-ray burst alerts
and spatially coincident muon-neutrino signatures, data from the Antares
neutrino telescope recorded between 2007 and 2012 are analysed. One year of
public data from the IceCube detector between 2008 and 2009 have been also
investigated. The respective timing profiles are scanned for statistically
significant accumulations within 40 days of the Gamma Ray Burst, as expected
from Lorentz Invariance Violation effects and some astrophysical models. No
significant excess over the expected accidental coincidence rate could be found
in either of the two data sets. The average strength of the neutrino signal is
found to be fainter than one detectable neutrino signal per hundred gamma-ray
bursts in the Antares data at 90% confidence level.
