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THE DISCOVERY OF A COMPANION TO THE LOWEST MASS WHITE DWARF

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Chandra Calibration StatusHRCLETGACIS Flight GradesCTI-Corrected graded mode dataCTI-corrected graded mode dataGrade distribution for CC mode dataCTI-corrected CC mode dataRevise ACIS contamination modelACIS ContaminantHRC Calibration ProjectsSlide 13Slide 14HRC-I Calibration ProjectsSlide 16LETG/HRC-S Calibration ProjectsChandra Calibration StatusChandra Calibration StatusACISACIS1.1.Gain corrections for epochs 28 and 29 (Nov. 2006 – April 2007) were released in Gain corrections for epochs 28 and 29 (Nov. 2006 – April 2007) were released in CALDB 3.4 on May 16, 2007.CALDB 3.4 on May 16, 2007.2.2.Gain corrections for epoch 30 (May 2007 – July 2007) were released in CALDB Gain corrections for epoch 30 (May 2007 – July 2007) were released in CALDB 3.4.1 on Sep. 14, 2007.3.4.1 on Sep. 14, 2007.3.3.The blank sky background data sets for ACIS-I and ACIS-S2 were reprocessed The blank sky background data sets for ACIS-I and ACIS-S2 were reprocessed with the latest calibration products and released in CALDB 3.4.with the latest calibration products and released in CALDB 3.4.4.4.CTI-corrected blank sky background data sets for the BI chips and updated 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 3.4.1.background data sets for the remaining FI chips were released in CALDB 3.4.1.HRCHRC1.1.Time-dependent gain correction tables (one for each Time-dependent gain correction tables (one for each year) for the HRC-I were released in CALDB 3.4.year) for the HRC-I were released in CALDB 3.4.2.2.An updated HRC-I de-gap corrections table derived An updated HRC-I de-gap corrections table derived from the AO8 Capella raster scan was released in from the AO8 Capella raster scan was released in CALDB 3.4.1. This improves image reconstruction CALDB 3.4.1. This improves image reconstruction for off-axis sources. for off-axis sources.LETGLETG1.1.An updated HRC-S QE table was released in CALDB 3.4 with An updated HRC-S QE table was released in CALDB 3.4 with revisions near the O-K edgerevisions near the O-K edge..HETGHETG1. 1. Revised ACIS-S/MEG 1Revised ACIS-S/MEG 1stst order LSF parameters were released in order LSF parameters were released in CALDB 3.4.CALDB 3.4.HRMAHRMA1. A verified Linux version of SAOsac was delivered to SDS for packaging into a downloadable version of the ray trace program.ACIS Flight ACIS Flight GradesGrades ACIS Calibration Projects Improve calibration of graded mode dataCTI-Corrected graded mode dataCTI-Corrected graded mode dataCTI-corrected graded mode dataCTI-corrected graded mode dataGrade distribution for CC mode dataGrade distribution for CC mode dataCTI-corrected CC mode dataCTI-corrected CC mode dataRevise ACIS contamination modelRevise ACIS contamination modelACIS ContaminantACIS ContaminantHRC Calibration ProjectsHRC Calibration Projects HRC-I gain correctionsHRC-I gain correctionsHRC-I QE UniformityHRC-I vs. HRC-S count rate for HZ43HRC-I Calibration ProjectsHRC-I Calibration Projects1.1.Monitor the HRC-I and HRC-S QE, gain, and filter transmission.Monitor the HRC-I and HRC-S QE, gain, and filter transmission.2.2.HRC-I QE map – there is evidence for decrease in the off-axis low energy QE HRC-I QE map – there is evidence for decrease in the off-axis low energy QE of the HRC-I.of the HRC-I.3.3.Absolute HRC-I QE – resolve the discrepancy between the observed and Absolute HRC-I QE – resolve the discrepancy between the observed and expected count rate of RXJ1856.expected count rate of RXJ1856.4.4.Calibrate the small scale gain variations in the HRC-I gain.Calibrate the small scale gain variations in the HRC-I gain.5.5.Update the HRC-I rmf using the time-dependent gain corrections.Update the HRC-I rmf using the time-dependent gain corrections.LETG/HRC-S Calibration ProjectsTime-dependent gain correctionsLETG/HRC-S Calibration ProjectsLETG/HRC-S Calibration Projects1.1.Generate high spatial resolution time-dependent gain corrections for the HRC-SGenerate high spatial resolution time-dependent gain corrections for the HRC-S2.2.Revise the HRC-S QE below the C-K edge.Revise the HRC-S QE below the C-K edge.3.3.Incorporate the non-linearity in the LETG/HRC-S dispersion relation into the line Incorporate the non-linearity in the LETG/HRC-S dispersion relation into the line response function.response function.4.4.Improve the LETG/HRC-S dispersion relation corrections using a larger database of Improve the LETG/HRC-S dispersion relation corrections using a larger database of emission line sources.emission line sources.5.5.Investigate the cause of the 5% drop in count rate in the LETG/HRC-S observations of Investigate the cause of the 5% drop in count rate in the LETG/HRC-S observations of HZ43.HZ43.HRMA Calibration ProjectsHRMA Calibration Projects 1.1.Continue development of a “user friendly” portable Linux version of Continue development of a “user friendly” portable Linux version of the SAOsac software package.the SAOsac software package.2.2.Post an engineering version of SAOsac on the contributed CXC Post an engineering version of SAOsac on the contributed CXC software page.software page.3.3.Continue work on calibrating the ACIS PSF of piled-up images.Continue work on calibrating the ACIS PSF of piled-up images.4.4.Refine the measurements on the drift of the optical axis.Refine the measurements on the drift of the optical axis.5.5.Continue XMM-Newton/Chandra cross-calibration efforts.Continue XMM-Newton/Chandra cross-calibration efforts.HETG Calibration Projects1. Improve CC mode HETG/ACIS-S


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