Chandra Calibration Status CUC Meeting Oct. 13, 2011

Chandra Calibration Status  Calibration updates since the 2010 CUC meeting  Internal Chandra cross-calibration status  Current calibration issues

 ACIS temperature-dependent gain correction software for timed-event (TE) mode data was released in CIAO on Dec. 15,  ACIS cti-correction software for TE data in graded (G) telemetry mode was released in CIAO 4.3  A new contamination model for the ACIS-I was released in CALDB  Time-dependent gain corrections for epochs ( Aug 2010 – July 2011) Recent Calibration Products and Software Releases ACIS

HRC  An update to the HRC-I QE to improve cross-calibration between HRC-I/HRC-S/ACIS-S was released in CALDB  HRC-I gain map for 2010 was released in CALDB  HRC-S rmf (using SAMP) was released in CALDB  A series of time-dependent HRC-S QE maps (one for each year) were released in CALDB (June 30, 2011) Recent Calibration Products or Software Releases

 Updated extraction regions and the clocking angle for dispersed LETG/ACIS-S spectra were released in CALDB  Revised LETG transmission efficiencies for orders m=2-10 were released in CALDB (April 26, 2011) Recent Calibration Products or Software Releases LETG

Internal Chandra Cross-Calibration Calibration products derived from ground-based data. Calibration products derived in-flight data and internal cross-calibration  HRMA effective area  ACIS-S and ACIS-I QE  LETG first order efficiency  MEG first order efficiency for E<1 keV  HEG first order efficiency for E>1 keV  Shape of HRC QE  HRC-I and HRC-S QE  LETG higher order efficiencies  ACIS contamination model  MEG first order efficiency for E>1keV  HEG first order efficiency for E<1keV

Internal Chandra Cross-Calibration Bare ACIS-S/ACIS-I cross-calibration Abell 1795 phabs*apec keV Temperature Abundance Flux 5% 3%

Bare ACIS-S/ACIS-I cross-calibration G phabs*pow  s =1.84   =1.78 Power-law index Flux Column density Filled symbols – full-frame Open symbols – sub-array NH S =3.07 NH I =2.91

Bare HRC-I/HRC-S/ACIS-S cross-calibration G %

Mirror Vignetting and ACIS QE MAP Abell 1795 ACIS-I3 X aim point read-out ACIS-S

Current ACIS Calibration Issues ACIS-I3 X ACIS contamination model Simultaneous two-temperature fit to 13108, and 13113

ACIS contamination model Simultaneous two-temperature fit to and and 13109

ACIS Detector

Spectral fit to the July 2011 LETG/ACIS-S observation of Mkn 421

Time-dependent ACIS QE ACIS-S3

Time-dependent ACIS QE ACIS-I3 Solution – a set of time sorted QEU maps

ACIS-S1 Gain E observations on S1 node 2

ACIS-S1 Gain Near default LETG/ACIS-S configuration E

Feature near the Si-K edge in bright sources Cyg X-2 TE Mode CC Mode

CC-F mode calibration Required products for CC-F mode calibration  Trap maps for CC mode data - done  Gain tables for CC mode data – done  QE tables for CC mode data After Dec – done Before Dec – being worked

Current LETG/HRC-S Calibration Issues Result of current grey correction – broad band flux

HRC-S energy-dependent QE loss

HRC-S Gain throughout the Chandra mission

Stability of the HRC-I QE

Current HETG Calibration Issues Sample of about 30 HETG/ACIS-S AGN observations CALDB CALDB version

Correction to HEG/MEG First Order Transmission Efficiency

LEG/MEG/HEG Cross-Calibration

Current Imaging Issues Dithered SAOTrace simulation of an HRC-I observation of AR Lac

HRC-I intrinsic spatial response Raw Gaussian Gaussian plus Lorentzian

Summary of Present Calibration Activities  Release CC- F mode calibration products  Release MEG/HEG first order transmission correction  Release updated ACIS contamination model  Investigate low energy HRC-S QE losses  Investigate Si-K edge feature in ACIS data of very bright sources  Improve the low energy gain calibration of S1  Incorporate dithered SAOTrace rays and updated HRC-I spatial response into MARX  Revise SAOTrace to produce better agreement between the raytrace simulations and the observed power in the wings of the PSF