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Time-resolved observations with ISIS

Time-resolved observations can be defined as those in which one is studying an astrophysical phenomenon which varies in time. The timescales may vary from milliseconds to years, depending on the object under study. Clearly, inefficiencies in observing procedure and instrumentation are of far greater importance when studying short-timescale variability than when studying long-timescale variability. Therefore, this section is primarily aimed at observers studying objects which vary on a timescale of seconds or minutes. However, many of the principles discussed are simply means of maximising observing efficiency and should therefore be of interest to all observers.

• Sources of dead-time
• Reducing dead-time
• Future developments
• A note on accurate time and ISIS