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How did the Swift Observatory locate gamma-ray bursts?

The Neil Gehrels Swift Observatory used three telescopes in sequence. Its gamma-ray telescope made the first detection of a gamma-ray burst. After the spacecraft turned toward the burst, the X-ray telescope produced a better position within 60 seconds of the first gamma rays being seen. Within 200 seconds, the ultraviolet-optical telescope produced the most accurate position. This quick process allowed Swift to study bursts shortly after they began.