GRB 830801
GRB 830801 is a gamma-ray burst that occurred on 1983 August 1. It is by far the all-time brightest GRB event known. It had a peak flux of 3.0 photons·cm·s·keV averaged from 50 to 300 keV, a dead time correction by a factor of 1.9, and a smooth light curve for the peak 256 ms time interval. The peak flux P256 was around 1400 photons·s−1·cm−2. This was also the first detection of the influence of a gamma burst on the upper atmosphere.