ULYSSES BEPPOSAX OBSERVATIONS OF COSMIC GAMMA-RAY-BURSTS/

BeppoSAX has been added to the 3rd Interplanetary Network of gamma-ray burst detectors. Of the 8 events observed to date by Ulysses and the BeppoSAX Gamma Ray Burst Monitor (GRBM), four have been localized by t riangulation, resulting in annuli whose 3 sigma widths are as small as 63''. These data give error boxes whose sizes are sometimes smaller t han those obtained with the SAX Wide Field Camera (WFC). They can be u sed to confirm the association between fading X-ray and optical source s and gamma-ray bursts.