Caveat: HRC Timing Anomalies
A problem has been discovered in Chandra HRC event times. A wiring error in the detector causes the time of an event to be associated not with that event, but with the following event (which may or may not be telemetered). The result is an error in HRC event timing such that the accuracy is degraded from about 16 microseconds to a time which is more or less the mean time between events.
Details are available from the following links: