During night 2008.03.18/19 the "Pi of the Sky" apparatus located at Las Campanas Observatory was observing the Swift satellite field of view with 10s exposures from 5:49 UT. At 6:12 UT we observed exceptionally bright optical flash reaching 5.8 magnitude. It was automatically detected by the flash recognition algorithm.
Brightest light ever seen by astronomers The brightest burst of light ever seen - which peaked at a few hundred million billion times the brightness of our Sun - has been witnessed by astronomers.
The Swift satellite detected a intense gamma-ray burst, GRB 080319B at 6:13 UTC, March 19th, 2008. The optical afterglow of the burst may have reached naked-eye visibility (magnitude ~ 5.7) for a brief few moments.