Final answer:
Gamma-ray bursts are classified into short-duration, lasting less than 2 seconds, and long-duration, typically about a minute. Short-duration GRBs may last only milliseconds and are linked to neutron star or black hole mergers. Long-duration GRBs are associated with supernovae of massive stars.
Step-by-step explanation:
The expected duration of an individual microburst, specifically concerning gamma-ray bursts (GRBs) in astrophysics, varies significantly. Observationally, gamma-ray bursts are classified into two categories: short-duration and long-duration bursts. Short-duration GRBs last less than 2 seconds, often just a fraction of a second, and are thought to originate from the mergers of neutron stars or black holes. Long-duration GRBs, on the other hand, last more than 2 seconds, typically around a minute, and are believed to be associated with the explosive deaths of massive stars in supernovae events.