Confirmed attendees

Virtual

Logistics

Date : 2022-08-25/26

Location: SLAC in-person and hybrid

SLAC rooms:  We have three rooms reserved in Bld. 53 all day for both days

  • 3004- Havasu ( 3rd floor) : Primary room, coffee/food location ( Zoom- # 1)
  • 4002- Toluca-( 4th floor) : Breakout room - ( Zoom - #2)
  • 4006- Tulare ( 4th floor) : Breakout room- ( Zoom- #3)

Zoom channels: 

Calibration workshop # 1

https://stanford.zoom.us/j/94091115031?pwd=R0tUS1R2RFRDMUpRMW8xQVVBbVRHdz09

    Password: 271390

Or Telephone:

    Dial: +1 650 724 9799 (US, Canada, Caribbean Toll) or +1 833 302 1536 (US, Canada, Caribbean Toll Free)

    Meeting ID: 940 9111 5031

    Password: 271390


Calibration Workshop # 2

Join from PC, Mac, Linux, iOS or Android: https://stanford.zoom.us/j/96167369631?pwd=ZzNwL3M4Q2JYbG9GODFxNllhTG1iZz09

    Password: 948060

Or Telephone:

    Dial: +1 650 724 9799 (US, Canada, Caribbean Toll) or +1 833 302 1536 (US, Canada, Caribbean Toll Free)  

    Meeting ID: 961 6736 9631

    Password: 948060


Calibration Workshop # 3

Join from PC, Mac, Linux, iOS or Android: https://stanford.zoom.us/j/99821797751?pwd=dC94cEExRW5LYUhtb1ZSTnhsbDY5UT09

    Password: 810284

Or Telephone:

    Dial: +1 650 724 9799 (US, Canada, Caribbean Toll) or +1 833 302 1536 (US, Canada, Caribbean Toll Free)    

    Meeting ID: 998 2179 7751

    Password: 810284

Resources

Workshop Goals 

The goal of the workshop is to define and document the full end-to-end strategy for LSST calibration, from ISR through global astrometric and photometric calibrations. The workshop aims to identify what needs to be addressed and how the different stages of calibration relate to each other, not precisely how to address them.  For example, a list of effects that need to be corrected for in ISR is in scope, but not necessarily the precise algorithms that will be used. 

Desired Outcomes:

  1. Flowchart for the end-to-end calibration strategy
  2. An initial draft of the LSST Calibration construction paper defining the full LSST end-to-end calibration strategy.

Workshop Covid Policy

The workshop will follow Current Stanford Covid-19 guidelines for visitors. All in-person attendees must:

  • present proof of vaccination cards in the Bldg 53 lobby to enter SLAC;
  • wear a mask during the meeting as per SLAC guidelines

Pre-workshop reading material

The following is a list of extant material on LSST calibration that attendees should be familiar with prior to the workshop.

Required reading before the workshop

  1. Instrumental response model and detrending for the Dark Energy Camera (Bernstein et al. 2017)
    • An excellent pedagogical description of how to do darks, flats, illumination correction, photometric calibration, etc.
    • The paper is focused on what was run for DES, but is much broader than that, with a comprehensive glossary and descriptions of how everything fits together.
  2. LSST The Hyper Suprime-Cam Software Pipeline (Bosch et al. 2017):  
    • A good description of the LSST Science Pipelines as of 2017. 
      • Note that Jointcal is no longer in the baseline and PSFex has been replaced with PIFF.
      • The deblending section is not relevant to calibration so can be skipped (and the deblender has been changed anyway)
      • The coaddition sections are also interesting but not necessary to know in detail for this workshop.
      • 4.9.2 : Aperture corrections are a very important part of calibration
  3. Level 2 Photometric Calibration for the LSST Survey : LSE-180 (Jones et al. 2013) 
    • LSST baseline for photometric calibration in 2013.
    • Many aspects are still relevant but it needs updating.
    • This technote can be used as a basis for much of the updated end-to-end calibration strategy.
    • The document source lives at https://github.com/lsst-sims/sims_documents (other docs also, including potentially useful python too)

Additional relevant material:

Workshop Planning, Agenda and Minutes







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