Detectors and Backgrounds Working Group (formerly CCD)

• Members (based on attendance at WG at any IACHEC - OUTDATED)
  Catherine Grant (chair, Chandra/ACIS), Andy Beardmore (Swift/XRT), Dick Edgar (Chandra/ACIS), Matteo Guainazzi (XMM/EPIC), Eric Miller (Suzaku/XIS), Paul Plucinsky (Chandra/ACIS), Steve Sembay (XMM/EPIC-MOS), Michael Smith (XMM/EPIC-pn), Mutsumi Sugizaki (MAXI/SSC), Masahiro Tsujimoto (Suzaku/XIS), Claudio Pagini (Swift/XRT), Kip Kuntz, Jon Gelbord (Swift/XRT), Norbert Schultz (Chandra/ACIS), Kenji Hamaguchi (Suzaku/XIS), Vinay Kashyap (Chandra), Jenny Posson-Brown (Chandra/ACIS), Diab Jerius (Chandra), Keith Arnaud (XSPEC), Terry Gaetz (Chandra/ACIS), Kip Kuntz (Backgrounds), Lorenzo Natalucci (Backgrounds), Nick Durham (Chandra/ACIS), Koji Mori (Hitomi/SXI), Silvano Molendi (XMM background)

• Missions
  Chandra-ACIS, XMM EPIC-pn, XMM EPIC-MOS, Swift XRT, Suzaku XIS, MAXI SSC, Hitomi SXI

• Purpose (from April 2010 meeting)
  • Provide a forum for cross-mission discussion and comparison of CCD-specific modeling and calibration issues
  • Produce documents (SPIE level) discussing these comparisons, pros/cons of each approach
  • Produce a document (A&A level?) discussing lessons learned and best practices for CCD-based instruments

• Short-term Goals (from April 2010 meeting)
  • Provide structure for organizing/sharing information (this wiki)
    • Library of links to key papers and memos, indexed by mission, topic (i.e. CTI monitoring, correction, etc.) (in progress, see below)
  • Establish three sub-groups for detailed study of topics of special interest
    • Residuals around the Si-K edge (Miller)
    • CTI Correction - Energy Dependence of CTI (Beardmore)
    • Challenges in calibrating timing modes (Tsujimoto)
    • Charge Injection?

• Discussion Topics at IACHEC 2011
  • Tour of the CCD Working Group wiki page
  • Timing modes
    • Matteo Guainazzi, XMM EPIC-pn
    • Andy Beardmore, Swift XRT
    • Catherine Grant, Chandra ACIS
  • XIS/ACIS performance evolution comparison study
  • Future Plans
    • Continue to populate the wiki
    • Address questions raised by timing modes discussion
    • ACIS/XIS performance evolution paper
    • IACHEC WG meetings are productive, keep this conversation going outside of physical meetings

• Discussion Topics at IACHEC 2012
  • Andy Beardmore, Swift XRT CCD22 Simulator MkII
  • Matteo Guainazzi (for Prashin Jethwa), The EPIC simulator and and pile-up modeling
  • Steve Sembay, The problem with pattern 31
  • Catherine Grant, ACIS topics: QE evolution, ACIS/XIS comparison study, ACIS as its own radiation monitor
    
    
• Discussion Topics at IACHEC 2013
  • Terry Gaetz, Update on the ACIS background
  • Eric Miller, Update on the Suzaku background evolution
  • Matteo Guainazzi, The energy scale in EPIC-pn Timing Mode exposures
  • Claudio Pagani, CCD charge traps: properties and how to deal with them
    
    
• Discussion Topics at IACHEC 2014
  • Backgrounds WG
    • Terry Gaetz, Chandra ACIS background uniformity
    • Kip Kuntz, Soft proton flares in XMM and Chandra
    • Lorenzo Natalucci, The particle background of the X-IFU instrument onboard of ATHENA
  • CCDs WG
    • Nick Durham, Evaluating the ACIS temperature-dependent CTI correction
    • Terry Gaetz, Chandra ACIS BI low-energy gain
    • Steve Sembay, The evolution of deep traps in the MOS CCDs
    • Norbert Schultz, Chandra HETG observations at high X-ray fluxes

• Discussion Topics at IACHEC 2015
  • Nick Durham: Measurements from Chandra ECS
  • Terry Gaetz: Updated analysis of Chandra ACIS background
  • Terry Gaetz: Current status of Chandra ACIS low energy BI CCD gain calibration
  • Matteo Guainazzi: The Cyg X-3 IACHEC experiment: EPIC-pn results
  • Norbert Schultz: Cyg X-3 Cross-Calibration with XMM-Newton and Swift: HETG and CC-mode
  • Michael Smith: Quiescent Background and the EPIC-pn Energy Scale
    
    
• Discussion Topics at IACHEC 2016
  • Steve Sembay: Challenges of operating CCDs in a high radiation environment
  • Eric Miller: Effects of power-cycling on Suzaku XIS CCD
  • Catherine Grant: Evolution of temperature-dependent CTI correction for Chandra ACIS CCDs
  • Jamie Kennea: Swift XRT gain/CTI/trap calibration update

• Discussion Topics at IACHEC 2017
  • Silvano Molendi: An in-depth analysis of the EPIC-MOS instrumental background
  • Konrad Dennerl: An empirical method for improving the XMM-Newton/EPIC-pn RMF and ARFs
  • Terry Gaetz: Chandra ACIS I3 response width
  • Nick Durham: ACIS Gain Studies, Time and Location Dependences
  • Terry Gaetz: Chandra ACIS background
  • K. Mori: Hitomi/SXI overview
  • H. Uchida: Hitomi/SXI on-board calibration
  • Andy Beardmore: Deferred charge release from charge traps in Swift-XRT WT mode observations
    
    
• Discussion Topics at IACHEC 2018
  • X. Li: On-ground and in-orbit calibration of Insight-HXMT/HE
  • T. Ying: On-ground and in-orbit calibration of Insight-HXMT/ME
  • Terry Gaetz: Status of Updating the Chandra ACIS response and gain
  • Nick Durham: ACIS QEU Calibration Status
  • K. D. Kuntz: The XMM Quiescent Particle Background
  • B. Grefenstette: Long-term gain calibration of the NuSTAR detectors
  • C. Heinitz: Cross-calibrating the XMM EPIC effective areas for a default empirical correction
    
    
• Discussion Topics at IACHEC 2019
  • Nick Durham: ACIS Gain Calibration Challenges
  • Hiromasa Miyasaka: Low energy response calibration and long term gain monitoring of the NuSTAR detectors
  • Terry Gaetz: Update of the status of the Chandra ACIS response
  • Kiyoshi Hayashida: A solution to the Si-K edge problem in the Suzaku XIS Response and its implication to XRISM Xtend
  • Ivan Valtchanov: EPIC-pn long term CTI
  • Hiroshi Murakami: New clocking mode for X-ray CCD detector

• CCD Reference Library

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