Rossi X-ray Timing Explorer (RXTE)
A NASA X-ray astronomy satellite launched in 1995. It was named in honour of the X-ray astronomy pioneer, Bruno B. Rossi, in 1996 after launch. The spacecraft was equipped with three instruments. The Proportional Counter Array and the High-Energy X-ray Timing Experiment (HEXTE) working together constituted the largest X-ray telescope flown to date, sensitive to X-rays from 2 to 200 keV. The third instrument, the All Sky Monitor, was designed to record the long-term behaviour of X-ray sources and to monitor the sky.