Telecon Notes April 18, 2018

Attendance: Shaul, Dan, Bill, Charles, Nick, Amy

Notes by: Karl

• Github Repo
• Report outline; Our Proposal was arranged by science deliverables; and so is the S4 science book.
• Interesting Figure from Alex Van Engelen

• Github Repo
• Report outline, 50 page limit
  • Our Proposal was arranged by science deliverables; and so is the S4 science book.
  • Current outline follows working groups, science deliverables might make more sense.
    • CL: Organizing science around what drives the design. So grouping things slightly differently. Improves flow of science into mission design.
      • SH: So high frequency channels (galactic science) is one of these drivers.
      • CL: yes, OK. Make it clear.
    • CL: Extragalactic science includes some things that are more cosmological than astronomical object. Those could be separate. Minor detail.
    • CL: Complementarity also needs to be discussed.
    • SH: Jamie advocated a joint PICO-S4 or space-ground white paper to discuss complementarity.
    • CL: Attaching such a white paper would be effective for document to decadal.
  • Decision: Section 3 rearrange to science deliverables. Separate science drivers and non-driving science.
    • Also add ~0.5 page for complementarity with ground.
  • Shaul will rearrange outline, so next week can discuss writing assignments and final those during workshop.
• AT: TeamX slides status.
  • Instrument slides. Gave feedback, TeamX integrating comments.
    • Probably final iteration, before release to EC.
    • TeamX probably done in week timescale
  • Today reviewing Mission slides.
  • After these to rounds will release to EC.
• Interesting Figure from Alex Van Engelen, for APS talk.
  • lensing potential, for EB estimator we seem to have lower noise. EB is the more effective estimator.
  • Bill: complementarity/competitiveness with S4 don't need to be mutually exclusive.
  • General discussion: Why does PICO do better? PICO has better E-mode measurement.
    • SH: Why S4 better at TT, PICO better at EB?
    • Dan: PICO beam means lose modes > ell 2000-ish. Lensing connects high ell to low, so those modes are valuable.
  • SH: Other new from science groups.
    • Nick estimates 140k SZ clusters; within ~10k of S4.
    • Nick also estimate 9 meV limit on neutrino mass. using cluster counts. dN/dz
      • SH: does this make sense?
      • Dan: If using growth of structure you can avoid the absolute calibration (tau) and potentially do better. Don't know if this is what he did.
      • SH: dN/dz also requires z, so more further work would be needed.
      • Nick: not doing that here, still tau limited.
        • Dan's 14 meV is also tau limited.
        • may be details in the calculations that account for this difference?
        • Nick will look into the details. see if there is additional information being added by PICO.