Chandra Calibration Status ACIS 1.Gain corrections for epochs 28 and 29 (Nov. 2006 – April 2007) were released in CALDB 3.4 on May 16, 2007. 2.Gain corrections.

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Chandra Calibration Status ACIS 1.Gain corrections for epochs 28 and 29 (Nov – April 2007) were released in CALDB 3.4 on May 16, Gain corrections for epoch 30 (May 2007 – July 2007) were released in CALDB on Sep. 14, The blank sky background data sets for ACIS-I and ACIS-S2 were reprocessed with the latest calibration products and released in CALDB CTI-corrected blank sky background data sets for the BI chips and updated background data sets for the remaining FI chips were released in CALDB

HRC 1.Time-dependent gain correction tables (one for each year) for the HRC-I were released in CALDB An updated HRC-I de-gap corrections table derived from the AO8 Capella raster scan was released in CALDB This improves image reconstruction for off-axis sources.

LETG 1.An updated HRC-S QE table was released in CALDB 3.4 with revisions near the O-K edge. HETG 1. Revised ACIS-S/MEG 1 st order LSF parameters were released in CALDB 3.4. HRMA 1. A verified Linux version of SAOsac was delivered to SDS for packaging into a downloadable version of the ray trace program.

ACIS Flight Grades ACIS Calibration Projects Improve calibration of graded mode data

CTI-Corrected graded mode data

CTI-corrected graded mode data

Grade distribution for CC mode data

CTI-corrected CC mode data

Revise ACIS contamination model

ACIS Contaminant

HRC Calibration Projects HRC-I gain corrections

HRC-I QE Uniformity

HRC-I vs. HRC-S count rate for HZ43

HRC-I Calibration Projects 1.Monitor the HRC-I and HRC-S QE, gain, and filter transmission. 2.HRC-I QE map – there is evidence for decrease in the off-axis low energy QE of the HRC-I. 3.Absolute HRC-I QE – resolve the discrepancy between the observed and expected count rate of RXJ Calibrate the small scale gain variations in the HRC-I gain. 5.Update the HRC-I rmf using the time-dependent gain corrections.

LETG/HRC-S Calibration Projects Time-dependent gain corrections

LETG/HRC-S Calibration Projects 1.Generate high spatial resolution time-dependent gain corrections for the HRC-S 2.Revise the HRC-S QE below the C-K edge. 3.Incorporate the non-linearity in the LETG/HRC-S dispersion relation into the line response function. 4.Improve the LETG/HRC-S dispersion relation corrections using a larger database of emission line sources. 5.Investigate the cause of the 5% drop in count rate in the LETG/HRC-S observations of HZ43.

HRMA Calibration Projects HRMA Calibration Projects 1.Continue development of a “user friendly” portable Linux version of the SAOsac software package. 2.Post an engineering version of SAOsac on the contributed CXC software page. 3.Continue work on calibrating the ACIS PSF of piled-up images. 4.Refine the measurements on the drift of the optical axis. 5.Continue XMM-Newton/Chandra cross-calibration efforts. HETG Calibration Projects 1. Improve CC mode HETG/ACIS-S data.