Attendees:


Notes:

  • Merlin Fisher-Levine 
    • Camera feedback issues.
    • Auxtel calib updates – crosstalk or defects.
      • Update now, verify later?
      • Saturation during calib construction.
        • Pre- or post- overscan subtraction?  Problem on LSSTCam with large bias.
  • Christopher Waters 
    • Need someone careful to look at electrons vs ADU unit issues?
    • Metrics development needs ip_isr image binning and cp_verify in ci_cpp.
    • Is the CR background removal the correct solution?
    • Fringing PCA solution.
    • Dust spot angle dependence.
  • Robert Lupton 
    • Talking to Agnès Ferté for fiber spectrograph ingest done.
    • Aaron wants synthetic flats for the CCOB.
      • What if we don't have a flat illumination system/calibration screen?
        • Twilight flats?
        • Make a plan for this.
      • Apply gains to get a synthetic flat?
        • Raft-to-raft variations in QE should be corrected.
      • Have a plan ready for ~2024-08-xx.
      • Gain normalized flat fields
        • Gains from PTC.
    • Demonstrate things are working:
      • List of demonstrated functionality for calibration.
      • What needs to be working for things to be complete.
        • Do we need CBP?
        • Do we need calibration screen with laser illumination?
      • Requirements for switch to operations.
      • Needs to be written down.
        • Blockers for completion.
  • Eli Rykoff 
    • Initial star selection to sort out PSF stars.
      • Checking why current metrics are degraded by these improvements.
      • Needs full RC2 to check.
    • FGCM with LATISS.
      • Twilight flat made little difference from dome flat processing.
    • QE correction for HSC PDR2.
      • Improvements for the g-band.
      • Trust filter scans, but not the QE measurements.
      • Synthesis of filter scans from multi-angle inputs.
      • Mask vignetted region of the focal plan?
        • Should be identified, but probably shouldn't be excluded.
        • Exclude from cell-based co-adds.
      • Use stars to understand QE variations, under the assumption we understand the filters.