CXC Instruments and Calibration - main CXC calibration web page.
HETG Technical Notes - HETG in-flight performance and operation.
Multi-mission cross-calibration, see: IACHEC
HETG at XRCF - Ground Calibration of the HETG.
Early flight history...
HETG observations table - Manually edited during first three years of flight.
HETG status - year one - Occasional status during first year of flight.