Chandra Calibration StatusChandra Calibration Status

Recent releases

Current Calibration projects

Cross-Calibration between Chandra and other X-ray telescopes

Revisions to the Chandra calibration web pages

ACIS time-dependent gain corrections released in April, June and Oct.

HRC-I gain map for 2009 released in June.

HRC-I blank field background image released in June.

HRC-I background spectrum released in June

The ACIS-S4 blank field background files were reprocessed with the latest version of destreak and released in Oct.

The temperature-dependent cti-correction software was posted on the contributed software page in Oct.

Recent Calibration Products or Software Releases

Status of ACIS CC Mode Calibration Status of ACIS CC Mode Calibration

MEG m=1

HEG m=1

MEG m=3

HEG 2 + MEG 4

Her X-1

Present Default – TE mode trap map CC-F mode trap map

Status of ACIS CC Mode Calibration Status of ACIS CC Mode Calibration

Things to do:

1) Test CC-F mode trap map with HETG/ACIS-S CC-mode data

2) Generate a CC-F mode gain table

3) Generate a CC-F mode QE file for data taken prior to Dec, 2009 (i.e., data that did not include flight grade 66)

11.2 Crab Sco X-1

HETG/ACIS-S CC-F Mode Observations of X-Ray Bright SourcesHETG/ACIS-S CC-F Mode Observations of X-Ray Bright Sources

HETG GTO target GX13+1

Updates to the HRC-I Effective AreaUpdates to the HRC-I Effective AreaThe HRC-I QE has recently been updated to improve the cross-calibration between the HRC-I and other Chandra detectors using HZ43, PKS2155-304 and G21.5-09.

Target Obs. Rate Pred. N0007 %diff Pred. N0008 %diff

HZ43 3.88 3.88 3.46 8.7 3.91 0.9

PKS2155 1.54 1.64 6.5 1.53 0.6

G21.5-09 0.541 0.601 11 0.541 0.0

PSF FeaturePSF Feature 7460

6119

Tau CMa

PSF FeaturePSF Feature

ACIS-I

Ratio of counts between 0.5-1.0” in + and – Z direction (i.e., parallel to the SIM)

Tau CMa

PSF FeaturePSF Feature

Tau CMa

AR Lac Observation to Diagnose PSF AR Lac Observation to Diagnose PSF FeatureFeature

Updates to the LETG/HRC-S First Order Effective AreaUpdates to the LETG/HRC-S First Order Effective Area

The next CALDB will contain updates to the LETG/ACIS-S source and background extraction regions and the fraction of events within the source extraction region.

Things to do:

1) Revise the HRC-S QE

2) Revise the LETG/HRC-S extraction region for self-consistent cross-calibration

Update to the ACIS-I contamination Update to the ACIS-I contamination modelmodel

Version 9932 will be released as the default ACIS-I contamination model in Dec. 2010. No Changes will be made to the ACIS-S contamination model.

Comparison of two ACIS-I observations of AWM7 taken 10 years apart fit with the CALDB andV9932 versions of the ACIS-I contamination model.

Update to the ACIS-I contamination Update to the ACIS-I contamination modelmodel

Cross-calibration of the ACIS-S and ACIS-I contamination models (as of Dec. 2010) using ACIS-I and ACIS-S observations of A1795 taken 4 years apart.

Update to the ACIS-I contamination Update to the ACIS-I contamination modelmodel

Cross-calibration between the ACIS-S and ACIS-I contamination models using two observations of the Coma cluster taken 10 years apart.

Continuing Studies of the ACIS-S Continuing Studies of the ACIS-S ContaminantContaminant

Cluster Fluxes – XMM-Newton

Cross-Calibrating X-ray Detectors with Clusters of Galaxies: an IACHEC Cross-Calibrating X-ray Detectors with Clusters of Galaxies: an IACHEC Study (Nevalainen, David & Guainazzi) (astro-ph 1008.2102)Study (Nevalainen, David & Guainazzi) (astro-ph 1008.2102)

Cluster Fluxes – PN/ACIS

Summary of Cluster and Flux Cross-Calibration between XMM-Newton and Chandra

Cross-Calibration of the X-Ray Instruments Cross-Calibration of the X-Ray Instruments Onboard the Chandra, INTEGRAL, RXTE, Suzaku, Onboard the Chandra, INTEGRAL, RXTE, Suzaku, Swift and XMM-Newton Observatories (Tsujimoto Swift and XMM-Newton Observatories (Tsujimoto et al. 2010) (astro-ph 1009.2812)et al. 2010) (astro-ph 1009.2812)

G21.5-09

G21.5-09

Soft band = 2-8 keV

ACIS-S3

G21.5-09XMM-Newton

G21.5-09Cross-Calibration

Chandra/Suzaku Cross-Calibration

PKS 2155-304

Revisions to the Calibration Web Pages