GRB 670702
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.jpg) The Vela satellites which detected the gamma ray burst | |
| Event type | Gamma ray burst |
|---|---|
| Date | July 1967 |
| Duration | Seconds |
| Instrument | Vela 4 |
| Notable features | First gamma ray burst discovered |
| Other designations | GRB 670702 |
GRB 670702 is a gamma ray burst (GRB) known for being the first gamma ray burst detected in history.[1][2] It was detected on the second of July in the year 1967 by the Vela 4 satellite, a US satellite that monitored worldwide compliance to the with the 1963 nuclear test ban treaty.[3] The event lasted around ten seconds with an energy emission in the MeV band and a double pulse light curve. Its properties were distinct from those expected from a nuclear test in space. Directional information strongly suggested an origin distinct from the Earth or Sun.[4]