Search for gravitational radiation with the Allegro and Explorer detectors

The results of a search for short bursts of gravitational radiation coincident between the Allegro and Explorer cryogenic resonant mass detectors with strain amplitudes greater than $3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}18}$ are reported for data taken from June until December of 1991. While no significant excess of coincident events was found, an improved upper limit to the rate of gravitational wave bursts incident on Earth has been set.