A Review of Some Radio and Microwave Searches for Transient Phenomena in Relation to Vela Gamma-Ray Bursts and Supernovae

Radio systems with all sky viewing antennas at 151 MHz were operating at 5 widely spaced stations over the period 1970–1973, during which 19 Vela γ-ray bursts were detected. The records were analysed for each Vela time but no radio coincidences were recorded. A new experiment in the radio band operating at 408 MHz with similar objectives is now under construction and will be described. Five radiometers at 10 GHz have been tracking the Perseus cluster of galaxies for over one year. The supernova reported on 1 March in Perseus occurred during our oberving time but failed to give evidence from prompt emission in excess to 8×10^‑11 erg cm^‑2 event^‑1, for event durations 0.3–100 s.