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.

Analysis Notes

Matching CIAO and CALDB Versions

CALDB 4.8.2 should not be used unless you are running CIAO 4.5 or later versions.

Are your versions mismatched? Time to upgrade CIAO and CALDB!

News

Previous Items

13 Dec 2018 [New]

CalDB 4.8.2, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are HRC-I 2018 GMAP (sampgain) upgrade with associated PIBGSPEC (background spectrum), and HRC-S Version N0010 time-dependent QEU upgrade files. See the CalDB 4.8.2 Release Notes for details.

13 Dec 2018 [New]

Chandra CfP Cycle 21 proposal planning support data and information have been released, including PIMMS Effective Areas, and model ARFs and RMFs for ACIS Imaging and GRATINGs proposal planning purposes. See the Calibration Proposal Planning web pages for information and access to downloadable files.

25 Oct 2018

CalDB 4.8.1, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS Contamination (CONTAM) file version N0012, with an upgrade to the ACIS-S model. See the CalDB 4.8.1 Release Notes for details.

11 Sep 2018

CalDB 4.8.0, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS time-dependent gain correction updates for Epochs 73 & 74 (01 Feb through 31 July 2018) and finalization of the Epochs 71 & 72 files (01 Aug 2017 through 31 Jan 2018.) See the CalDB 4.8.0 Release Notes for details.

28 Jun 2018

CalDB 4.7.9, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS CONTAM verion N0011, with modifications to the ACIS-I array, HRC-I time-dependent QE files, and HRC-S upgraded time-dependent QEU files. See the CalDB 4.7.9 Release Notes for details.

19 Mar 2018

CalDB 4.7.8, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS T_GAIN Epochs 71+72 (Aug 2017 through Jan 2018) updates, with final versions of Epochs 69+70 (Feb through Jul 2017), as well as an upgrade of the HRC-S GAPLOOKUP (degap solution) table to version N0004. See the CalDB 4.7.8 Release Notes for details.