ULYSSES precise localizations of gamma-ray bursts.
Cline, T.; Hurley, K.; Kouveliotou, C.; Sommer, M.; Boer, M.; Niel, M.; Wilson, R.; Laros, J.; Fishman, G.; Meegan, C.; Fenimore, E.; Klebesadel, R.; Paciesas, W.
United States, Germany, France
Abstract
The Ulysses mission is presently about 5 AU from Earth, in the vicinity of Jupiter. It carries a gamma-ray burst detector sensitive to ≈ 15 - 150 keV X-rays, with time resolution down to 8 ms. for the purpose of high accuracy burst localization by the time-of-arrival method. This spacecraft, which is farther from Earth than any previous mission with a burst detector, operates in conjunction with other missions in the 3rd Interplanetary Network, such as Pioneer Venus Orbiter (PVO) and Compton GRO (CGRO). The Network has detected about 40 bursts since the launch of CGRO, and is localizing them with high accuracy. We present the current event list and discuss the error boxes of two recently observed weak gamma-bursts.