BAT meaning in Academic & Science ?

The Neil Gehrels Swift Observatory, previously called the Swift Gamma-Ray Burst Mission, is a NASA space observatory designed to detect gamma-ray bursts (GRBs). It was launched on November 20, 2004, aboard a Delta II rocket. Headed by Principal Investigator Neil Gehrels (until his death in 2017), NASA Goddard Space Flight Center, the mission was developed in a joint partnership between Goddard and an international consortium from the United States, United Kingdom, and Italy. The mission is operated by Pennsylvania State University as part of NASA's Medium Explorers program (MIDEX).