| Event type | Gamma-ray burst  |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 46m 38s |
| Declination | −19° 35′ 16″ |
| Redshift | 1.255 |
| Other designations | GRB 020813, GRB 020813A |
GRB 020813 was a gamma-ray burst (GRB) that was detected on 13 August 2002 at 02:44 UTC. A gamma-ray burst is a highly luminous flash associated with an explosion in a distant galaxy and producing gamma rays, the most energetic form of electromagnetic radiation, and often followed by a longer-lived "afterglow" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, and radio).
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