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Last modified: 11 December 2018

URL: http://cxc.harvard.edu/caldb/prop_plan/index.html

Chandra Proposal Planning


These calibration files, updated to the final CY21 release on 13 DEC 2018, are intended for use during the Chandra Cycle 21 Call for Proposals.

ACIS RMFs and ARFs

RMFs and ARFs for specific positions on ACIS-I and ACIS-S. These files were generated from the most recent CALDB available at the start of the current proposal cycle.

Grating RMFs and ARFs

Grating RMFs and ARFs for the HETG/ACIS-S, LETG/ACIS-S, and LETG/HRC-S grating/detector configurations. These files were generated from the most recent CALDB available at the start of the current proposal cycle.

PIMMS Effective Areas

Technical information and plots of the effective areas used to calculate count rates in the PIMMS software.

Chandra Effective Area Viewer

View the current cycle effective areas for the PIMMS-supported configurations, including plots and specific data values versus photon energy, and compare data from different cycles.