GRB 020813
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_(2003-grb020813-more-2).jpg) | |
| 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 |
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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).
GRB 020813 was detected on 13 August 2002 02:44 UTC by multiple instruments on the High Energy Transient Explorer. The burst lasted approximately 125 seconds. The initial position was estimated to be at a right ascension of 19h 46m 38s and a declination of −19° 35′ 16″.[1] In less than two hours after the burst had been detected, optical observations of the region were made with the Katzman Automatic Imaging Telescope which reveal the burst's optical afterglow.[2] In the days following the event, observations were made by the Chandra X-ray Observatory, which detected a fading X-ray afterglow.[3] The redshift for this event was approximately z = 1.254.[4]