Difference between revisions of "UMICH-2015: CMB-Lensing break-out session 1"

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Alex - CMB lensing intro, measuring CMB lens auto spectrum, neutrino mass forecasts, instrument requirements, systematic/foreground challenges  (15 min)
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==Lensing autospectrum  ==
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(Alex V. leading discussion, ~15 min)
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#CMB lensing intro
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#sensitivity to neutrino mass and other parameters (w, $\Omega_k$)
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#foreground challenges
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#*extragalactic polarized sources 
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#**how big of an issue can they be? The CMBPol study [http://lanl.arxiv.org/abs/0811.3916 0811.3916] shows they give small biases under conservative assumptions, particularly if the resolution is high enough to find sources
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#**They can also be projected out of the estimator (bias-hardening)
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#*Galactic dust
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#**Biases from nonzero connected four-point function at high-ell?  e.g. [http://arxiv.org/abs/1207.0508 1207.0508]
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#*Instrumental systematics
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#*gain variations, monopole leakagge, quadrupole leakage, pointing offsets
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Neelima - CMB halo lensing, mass estimate forecasts, instrument requirements, systematic/foreground challenges (10 min)
 
Neelima - CMB halo lensing, mass estimate forecasts, instrument requirements, systematic/foreground challenges (10 min)

Revision as of 13:05, 17 September 2015



Lensing autospectrum

(Alex V. leading discussion, ~15 min)

  1. CMB lensing intro
  2. sensitivity to neutrino mass and other parameters (w, $\Omega_k$)
  3. foreground challenges
    • extragalactic polarized sources
      • how big of an issue can they be? The CMBPol study 0811.3916 shows they give small biases under conservative assumptions, particularly if the resolution is high enough to find sources
      • They can also be projected out of the estimator (bias-hardening)
    • Galactic dust
      • Biases from nonzero connected four-point function at high-ell? e.g. 1207.0508
    • Instrumental systematics
    • gain variations, monopole leakagge, quadrupole leakage, pointing offsets



Neelima - CMB halo lensing, mass estimate forecasts, instrument requirements, systematic/foreground challenges (10 min)

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