RXTE

RXTE (or Rossi X-ray Timing Explorer or earlier, XTE or X-ray Timing Explorer) was a NASA Medium-class Explorer Program (MIDEX) X-ray space mission in operation from 1995 to 2016. Its goal was observing X-rays from compact objects (such as X-ray pulsars) including timing information of their pulses and variation. Instruments:

• ASM - All Sky Monitor.
• PCA - Proportional Counter Array.
• HEXTE - High Energy X-ray Timing Experiment.

While in operation, it also carried out an X-ray slew survey.