HRC Calibration

Resources:

• HRC chapter in Proposers' Observatory Guide
• CIAO data analysis guides for the HRC
• HRC products in the Calibration Database
• All HRC-related Chandra Calibration presentations
• HRC Instrument PI team page: Pre-flight calibration information
• HRC-S/LETG Observer Information
• Intrument Layout:
  

By Calibration Topic:

Instrument Sensitivity

On-Axis Effective Area (HRC+HRMA)

• Current HRC+HRMA Effective Area model
  • HRC-I+HRMA [v2.2; Oct 2003]
  • HRC-S+HRMA [v4; Nov 2004]
• Current Products [Jan 2005]
• Memos and presentations
  • Effect of new HRMA EA model on HRC-I [Feb 2009]
  • Calibration Dependencies for HRC-I effective area [Jan 2009]
  • Effective Area of the AXAF high resolution camera (HRC), Patnaude et al. [preflight; c.2000]

QE of the MCPs

• Current products
• HRC-I [v1.1; Jul 2001]
  $CALDB/data/chandra/hrc/qeu/hrciD1999-07-22qeuN0002.fits
• HRC-S [v3; Nov 2004]
  $CALDB/data/chandra/hrc/qeu/hrcsD1999-07-22qeuN0004.fits
• Flat Field Maps [Jan 2005]
• Summary of QE Models [2004]
• Relative QE as a function of Incident Angle [Jun 2002]
• Memos and presentations
  • Cal Presentations: HRC-I QE ; HRC-I QEU ; HRC-S QEU
  • Calibration Dependencies for HRC-S+LETGS QE [Nov 2008]
  • "An Update to the HRC-I Quantum Efficiency Model" (model v2.2), J. Posson-Brown, R. H. Donnelly, and D. Pease [27 October 2003]
  • "A New Flight Model of the HRC-I MCP Quantum Efficiency" (model v2.1) K. T. Hole, R. H. Donnelly, and J. Posson-Brown [6 August 2002]
  • HRC-S QEU details [Jun 2002]
  • SPIE papers:
    • "In-flight Effective Area Calibration of the Chandra LETGS", D. Pease, et al., 2002, SPIE Proc. 4851, 157
    • "Low Energy Effective Area of the Chandra Low Energy Transmission Grating Spectrometer", D. Pease, et al., 2000, SPIE Proc. 4012, 700
    • "In-flight Performance and Calibration of the Chandra High Resolution Camera Spectroscopic Readout (HRC-S)", R. Kraft, et al., 2000, SPIE Proc. 4012, 493

UVIS Filter Transmission

• Current models (Note: These are not stand-alone CALDB files -- they included in the CALDB QE files.)
• HRC-I [v4; Jun 2002]
• HRC-S [v4; Jun 2002]
  center, thick section
  center, thin section
  wings, thin section
  wings, thick section
  
• Current Model Summary and Description [Jun 2005]
• UVIS segments on the HRC-S
• Memos and presentations
  • UVIS monitoring with Vega [via Mike Juda; 24 Jul 2009]
  • Cal presentations
  • "Monitoring the Optical/UV Transmission of the HRC with Betelgeuse", J. Posson-Brown & V. Kashyap, CXC Memo [Jun 2005]
  • "Monitoring the HRC-S UV Rate: Observations of Vega", D. Pease, et al., CXC Memo [May 2005]
  • HRC-I response to out of band radiation, M. Zombeck [Mar 1999]
  • "Calibration of the UV/Ion Shields for the AXAF High Resolution Camera", Meehan, et al., 1997, SPIE 3114

Instrument Performance

Point Spread Function

• Current Products
• HRC-I [Nov 2000]
  type 1 - $CALDB/data/chandra/hrc/2d_psf/hrci1998-11-052dpsf1N0002.fits
  type 2 - $CALDB/data/chandra/hrc/2d_psf/hrci1998-11-052dpsf2N0002.fits
  type 3 - $CALDB/data/chandra/hrc/2d_psf/hrci1998-11-052dpsf3N0002.fits
  type 4 - $CALDB/data/chandra/hrc/2d_psf/hrci1998-11-052dpsf4N0002.fits
  
• HRC-S [Nov 2000]
  type 1 - $CALDB/data/chandra/hrc/2d_psf/hrcs1998-11-052dpsf1N0002.fits
  type 2 - $CALDB/data/chandra/hrc/2d_psf/hrcs1998-11-052dpsf2N0002.fits
  type 3 - $CALDB/data/chandra/hrc/2d_psf/hrcs1998-11-052dpsf3N0002.fits
  type 4 - $CALDB/data/chandra/hrc/2d_psf/hrcs1998-11-052dpsf4N0002.fits
  
• FWHM data products from XRCF [Jul 2002]
• Memos and presentations
  • Off-axis PSFs obtained during ACIS Stowed observations [Dec 2007]
  • Cal Presentations on Chandra PSF

Spectral Response

• Current products
• HRC-I [Nov 2005]
  $CALDB/data/chandra/hrc/rmf/hrciD1999-07-22rmfN0001.fits
• HRC-S [Nov 2006]
  $CALDB/data/chandra/hrc/rmf/hrcsD1999-07-22rmfN0001.fits
• Summary
• HRC-S RMF, V. Kashyap & J. Posson-Brown [Nov 2006]
• HRC-I RMF, V. Kashyap & J. Posson-Brown [Nov 2005]
• PHA response [June 2002]
• Memos and presentations
• Spectral Response of the HRC-I, V. Kashyap, 2005, CCW 2005.12

Timing

• On the HRC-S Timing Error [Apr 2003]
• Memos and presentations
  • "Astronomical Calibration of the Chandra Clock", A. Rots, 2003, CCW 2003.39
  • "HRC Science and Calibration", S. Murray, 2002, CCW 2002.6
  • "Absolute Time Calibration", A. Rots, 2002, CCW 2002.36
  • "HRC Event Time Tag Investigation", M. Juda, CXC Memo [Mar 2001]
  • PSR0540-69 Imaging/Timing with HRC-I, S. Murray [Sep 1999]

Background

• On-orbit background current status [Jul 2008]
• On-orbit background surface distribution for the HRC-I [Sep 2000]
• On-orbit background rates for the HRC-I [Oct 1999]
• On-orbit background rates for the HRC-S [Oct 1999]
• Memos and presentations
• High Resolution Camera Stowed Background Study, T. Isobe & M. Juda [Jan 2009]
• How to Create a Background Map for an Observation, T. Isobe & M. Juda [Jan 2009]
• Background Variablility in the Chandra High Resolution Camera, C. Wilton, 2003, CCW 2003.43
• "Characteristics of the On-Orbit Background of the Chandra X-ray Observatory High Resolution Camera", M. Juda, 2002, SPIE 4851, 112
• Time History of the HRC Background, M. Juda, CXC Memo [Mar 2001]
• HRC Response to SXRB, M. Juda, CXC Memo [July 1995]

Count Rate Linearity

• Nominal count rate correction factors for HRC-I: table ; figure [May 1998]
• Response of the HRC at high count rates [Jun 2002]
• Memos and presentations
  • "Count Rate Linearity of the AXAF High Resolution Camera (HRC)", D. Pease & H. Donnelly, ASC Calibration Memo [May 1998]

Data Processing

• Current Products
  • Event Flatness Test Coefficients
  • HRC-I [v1; Mar 2000]
    $CALDB/data/chandra/hrc/eftest/hrciD1999-07-22eftestN0001.fits
  • HRC-S [v1; Mar 2000]
    $CALDB/data/chandra/hrc/eftest/hrcsD1999-07-22eftestN0001.fits
  • Event Hyperbolic Test Coefficients
  • HRC-I [v3; Mar 2001]
    $CALDB/data/chandra/hrc/fptest/hrciD1999-07-22fptestN0003.fits
  • HRC-S [v4; Mar 2001]
    $CALDB/data/chandra/hrc/fptest/hrcsD1999-07-22fptestN0004.fits
• Description of status bit and H-test filtering [Feb 2006]
• Memos and presentations
• New HRC-S Gain Map and LETG Background Filter, B. Wargelin & P. Ratzlaff [Nov 2008]
• "Event Screening for the Chandra X-Ray Observatory High Resolution Camera (HRC)", S. Murray et al, SPIE, 2000

Degap and Position Corrections

• Current degap tables [Apr 2006]
• HRC-I: $CALDB/data/chandra/hrc/gaplookup/hrciD1999-07-22gaplookupN0003.fits
• HRC-S: $CALDB/data/chandra/hrc/gaplookup/hrcsD1999-07-22gaplookupN0002.fits
• Description of Degap Products
• Lookup tables [Apr 2006; supersedes all previous formats]
• HRC-S degap [Nov 2005]
• Polynomial corrections [Jun 2005]
• Corrlam: correcting nonlinearities in LETG+HRC-S dispersion relation [Feb 2005]
• Memos and presentations
• Cal Presentations
• SPIE presentations
  • Chandra HRC-S Degapping Corrections, V.L. Kashyap, et al., Proc. SPIE 5488-71, 2004
  • Update on the Non-Linearities in the Chandra LETG/HRC-S Dispersion Relation, S.M. Chung, et al., Proc. SPIE 5488-62, 2004
  • Characterizing nonlinearities in the Chandra LETGS + HRC-S dispersion relation S.M. Chung, et al., Proc. SPIE 5165, 518, 2003
  • Improving Chandra High Resolution Camera event positions via corrections to crossed-grid charge detector signals, M. Juda, et al., Proc. SPIE 4140, 155, 2000
• CXC Memos
  • Degap Corrections for HRC-I and HRC-S detectors, A. Kenter, et al., CXC Memo, Oct 1999
  • Degap as a Transformation of Probability Distribution Problem, A. Kenter, et al., CXC Memo, Mar 1999
  • HRC Degapping Corrections, M. Juda, CXC Memo, Aug 1998
  • HRC Position Logic, M. Juda, CXC Memo, July 1996

Gain Maps

• Current products
• HRC-I [May 2007]
  $CALDB/data/chandra/hrc/gmap/hrciD1998-10-30gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD1999-10-04gainN0003.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2000-12-12gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2002-01-26gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2003-02-22gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2004-11-25gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2005-10-17gainN0002.fits
  $CALDB/data/chandra/hrc/gmap/hrciD2006-09-06gainN0002.fits
• HRC-S [Jul 2000]
  $CALDB/data/chandra/hrc/gain/hrcsD1999-07-22gainN0001.fits
• Note: New gain maps will be available after the CIAO tool hrc_process_events is adapted to change the method by which spatially and temporally invariant PI values are calculated. Currently, PHA values are corrected to spatially and temporally invariant PI values using the gainmaps listed above. We are changing this such that the scaled sum of the amplifier signals are used instead of PHA. New gainmaps for the HRC-I will be provided to replace the current ones, and new sets of TGAIN maps that include time dependence will be provided for the HRC-S.
• HRC-I gain correction: methods and status [Jan 2009]
• New gain map and background filter for HRC-S/LETG [Nov 2008]
• Memos and presentations
• Cal presentations on HRC-I gain
• Cal presentations on HRC-S gain
• New HRC-S Gain Map and LETG Background Filter, B. Wargelin & P. Ratzlaff [Nov 2008]
• "HRC-I Gain Correction", J. Posson-Brown & V. Kashyap, 2007, SPIE 6686, 28
• HRC-I Gain Correction, J. Posson-Brown & V. Kashyap [Mar 2007]
• Monitoring the HRC-S Gain with the LETG/HRC-S, D. Pease & J. Drake [Oct 2003]
• Evolution of PHA Response in the HRC, J. Posson-Brown & R. H. Donnelly [May 2003]

Hot/Bad Pixels

• Current products
• HRC-I [v2; Apr 2002]
  $CALDB/data/chandra/hrc/badpix/hrciD1999-07-22badpixN0002.fits
• HRC-S [v3; Aug 2004]
  $CALDB/data/chandra/hrc/badpix/hrcsD1999-07-22badpixN0003.fits
• Status of HRC bad pixel maps [Oct 2004]
• Description of HRC-S bad pixel map [Jun 2004]
• Description of HRC-I bad pixel map [Mar 2002]

• Instrument Timeline [June 2009]
• HRC-I Plate Focus Analysis, L. David, O. Johnson, E. Beckerman [Sep 1999]
• Analysis of Un-de-dithered Focus Plates, D. Jerius [Sep 1999]

Geometry

• Images
  • Instrument Layout
  • UVIS segments on HRC-S
• Memos and presentations
• Locating the HRC Shutters, H. Donnelly [Aug 1999]
• HRC-S Coordinate Mapping, M. Juda [Feb 1999]

Monitoring

• HRC-I QE [Feb 2009]
• HRC-I Gain [May 2009]
• HRC-S QE [Apr 2009]
• HRC-S Gain [Dec 2006]
• UVIS monitoring of Vega [via Mike Juda; 24 Jul 2009]

Ground Calibration

• Summary of SAO and XRCF analysis by Instrument PI team
• PSF FWHM data products [XRCF; Jul 2002]
• Summary of BND Analysis [XRCF; Jun 2002]
• Response of the HRC at high count rates [XRCF; Jun 2002]
• Memos and presentations
• "Spectral Fitting of HXDS Beam Normalization Detectors: Results for HRC Tests (Phase G)", D. Pantnaude, D. Pease & H. Donnelly, CXC Memo [Apr 1998]

Chandra Science | Chandra Home | Astronomy links | iCXC (CXC only) | Search

The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.    Email: cxcweb@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2004. All rights reserved.