UCSD-2019: Analysis/Pipeline Working Group: Low-ell BB

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Charge

1. Identify key decisions that must be made (and justified) prior to CD-1,
2. Make progress on (or actually make) those decisions,
3. Lay out a timeline and process for making each decision, consistent with the post-decision work and internal reviews that will be needed to complete preparations for CD-1,
4. Ensure that those timelines and processes are understood and supported by the collaboration, and that we (together) believe we can follow them.

Key Issues

• How do we optimize detector allocation across frequency in the face of uncertainty about foreground properties, for both the SATs and the delensing LAT?
• What are the advantages of split bands? How does performance compare to non-split bands?
• Do we need a 20 GHz channel on delensing LAT (for SAT science)
• How well will de-lensing work in practice?
• What are the necessary analysis tools to answer these questions?

Agenda

1. Needs for CD1 [Wu], 5 minutes
2. Review of forecasting and data challenges for DSR [Pryke], 25 minutes
3. Review of forecasting and simulations for Simons Observatory inflation science [Alonso / Errard / Sherwin], 30 minutes
4. Plans for working group [all], 60 minutes
   1. Forecasting
      • Quantitative comparison of SO and CMB-S4 DSR forecasts
      • Feedback loop between forecasting and data challenges
   2. Data Challenge simulations
      • More / better foreground models
      • Instrumental systematics
      • Other map non-idealities, i.e. filtering / mode loss
      • Coordination with technical groups on instrument configuration, etc
      • What else needs to be demonstrated for CD1?
   3. Analysis of Data Challenges
      • Who plans to participate? How do we get more participation?
      • Delensing

Remote attendance

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