Chandra Proposal Planning

These calibration files, updated to the final CY20 release on 14 DEC 2017, are intended for use during the Chandra Cycle 20 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 4.8.1 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

11 Sep 2018 [New]

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.

14 Dec 2017

Chandra CfP Cycle 20 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.

14 Dec 2017

CalDB 4.7.7, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are HRC-I 2017 GMAP update, with corresponding PIBGSPEC update, and three new HRC-I blank-sky BKGRND events files. See the CalDB 4.7.7 Release Notes for details.

18 Aug 2017

CalDB 4.7.6, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS T_GAIN Epochs 69+70 upgrades, and updated versions of the ACIS GROUP G Blank-sky background files. See the CalDB 4.7.6 Release Notes for details.

20 Jul 2017

CalDB 4.7.5.1, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS time- and temperature-dependent CTI corrections for ACIS-S3 only (other chips are unaffected, ACIS Group G (2012 through 2015) Blank-sky Background events files, minor fixes for all the previous ACIS Blank-sky Background files (Groups A-F), and a minor correction to the HRC-S QEU file headers. See the CalDB 4.7.5. Release Notes and the CalDB 4.7.5.1 Release Notes for details.

04 May 2017

CalDB 4.7.4, an upgrade to CalDB 4.7.3 and later versions, has been released. Included items are ACIS T_GAIN Epoch 67+68, HRC-I QE version N0010, and HRC-S BADPIX and QEU upgrades for near-plate-gap events. See the CalDB 4.7.4 Release Notes for details.

15 Dec 2016

CalDB 4.7.3, an upgrade to CalDB 4.7.0 and later versions, has been released along with CIAO 4.9. Included items are ACIS T_GAIN Epoch 65+66, ACIS CONTAM version N0010, HRC-I GMAP and PIBGSPEC for September 2016, a header correction for predictive HRC-S QEU 2019, and PIMMS Cycle 19 Effective Areas. See the CalDB 4.7.3 Release Notes for details.

31 May 2016

CalDB 4.7.2, an upgrade to CalDB 4.7.3 and later versions, has been released. Included are two items which affect only ACIS GRADED CC-mode Obs_IDs taken since 2009-11-01: 1) ACIS GRADE file N0005, previously released with CalDB 4.6.4, has been retracted, and 2) the special ACIS QE for CC-modes has been re-indexed so that it will be used for all GRADED CC-mode observations over the full life of the mission. See the CALDB 4.7.2 Release Notes for details.

25 Mar 2016

CalDB 4.7.1, an upgrade to CalDB 4.7.3 and later versions, has been released. Included are the quarterly ACIS T_GAIN upgrades for Epochs 63 (Aug-Oct 2015) and 64 (Nov 2015 - Jan 2016). Provisional and upstaged ACIS T_GAIN files from 2013 and 2014 have been deleted from the distribution and index. See the CALDB 4.7.1 Release Notes for details.