Cycle 24 PIMMS Effective Areas
Released as of 15 DEC 2021
The PIMMS Cycle 24 effective areas are illustrated below. As is always the case, the time-delay factor for the ACIS contaminant build-up has been updated. No other changes to ACIS calibrations have been implemented since Cycle 23. The HRC-I and HRC-S configurations include new estimates of the central QE, and HRC-S includes and update to the current QEU file as well.
The model OBS_IDs and the ARF-building scripts have now been standardized for Chandra PIMMS calculations. Hence the procedures are the same as with cy23.
The Cycle 24 PIMMS Effective Area Public Information describes how the effective area files were generated, including the new HETG and LETG GREFFs and the new HRC-S QE file.
Effective area plots are provided for the following detector configurations: