GRB 080319B
GRB 080319B (also known as the Clarke event) was a gamma-ray burst (GRB) detected by the Swift satellite at 06:12 UTC on March 19, 2008. The burst set a new record for the farthest object that was observable with the naked eye: it had a peak visual apparent magnitude of 5.7 and remained visible to human eyes for approximately 30 seconds. The magnitude was brighter than 9.0 for approximately 60 seconds. If viewed from 1 AU away, it would have had a peak apparent magnitude of −67.57 (21 quadrillion times brighter than the Sun seen from Earth). It had an absolute magnitude of −38.6, beaten by GRB 220101A with −39.4 in 2023.
The afterglow of GRB 080319B imaged by Swift's X-ray Telescope (left) and Optical/Ultraviolet Telescope (right) | |
| Event type | Gamma-ray burst |
|---|---|
| Unknown | |
| Date | Swift Burst Alert Telescope (BAT) March 19, 2008 |
| Duration | 50 seconds |
| Constellation | Boötes |
| Right ascension | 14h 31m 40.98s |
| Declination | +36° 18' 8.8'' |
| Epoch | J2000 |
| Distance | 7.5 billion light-years (2.3 Gpc) z=0.937 |
| Redshift | 0.94 |
| Remnant | Unknown |
| Progenitor | Unknown |
| Progenitor type | Unknown |
| Colour (B-V) | Unknown |
| Peak apparent magnitude | 5.3 |
| Other designations | GRB 080319B |
| Related media on Commons | |
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