A Gamma-Ray Bursts' Fluence-Duration Correlation
  We present an analysis indicating that there is a correlation between the fluences and the durations of gamma-ray bursts, and provide arguments that this reflects a correlation between the total emitted energies and the intrinsic durations. For the short (long) bursts the total emitted energies are roughly proportional to the first (second) power of the intrinsic duration. This difference in the energy-duration relationship is statistically significant, and may provide an interesting constraint on models aiming to explain the short and long gamma-ray bursts. 
Istvan Horvath, Lajos G. Balazs, Peter Meszaros, Zsolt Bagoly and   Attila Meszaros