# Difference between revisions of "UMICH-2015: CMB-Lensing break-out session 2"

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+ | ==Delensing Details== | ||

+ | [[File:delensing.pdf]] | ||

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Questions for discussion | Questions for discussion | ||

+ | #Experiment design | ||

+ | #*Can we combine different experiments, and is it worth having two different noise levels on two experiments (high-res + low-res) | ||

#Algorithms - Quadratic Estimator / Iterative / Sampling | #Algorithms - Quadratic Estimator / Iterative / Sampling | ||

#*What is the best algorithm to use? | #*What is the best algorithm to use? | ||

+ | #*How low ell do we use/need for reconstruction? | ||

#Systematics and Delensing | #Systematics and Delensing | ||

#*Dust foregrounds and sources - how do they propagate through the delensing procedure? How much do they matter? | #*Dust foregrounds and sources - how do they propagate through the delensing procedure? How much do they matter? | ||

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==CMB Lensing Cross-correlations== | ==CMB Lensing Cross-correlations== | ||

− | + | [[File:crosses.pdf]] | |

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− | #weak lensing calibration: cross-correlations with LSST / Euclid weak lensing | + | Questions for discussion: |

+ | #weak lensing calibration: cross-correlations with LSST / Euclid / ... weak lensing | ||

#*how precise are the correlations? | #*how precise are the correlations? | ||

#*is this level of multiplicative bias calibration interesting? | #*is this level of multiplicative bias calibration interesting? | ||

#*are intrinsic alignments a limiting factor? | #*are intrinsic alignments a limiting factor? | ||

− | #clustering from correlations with DESI/Euclid/LSST | + | #clustering from correlations with DESI/Euclid/LSST galaxies / quasars / ... |

#*how well can biases be modeled and constrained? | #*how well can biases be modeled and constrained? | ||

− | #*can | + | #*can these observables be used cleanly and powerful enough to detect neutrino mass? |

#*what are the key science drivers in extragalactic astrophysics? | #*what are the key science drivers in extragalactic astrophysics? | ||

#other surveys | #other surveys | ||

#*would overlap with external datasets gain from a northern site? | #*would overlap with external datasets gain from a northern site? | ||

+ | #*is there a way to make use of cross-correlations with Ly-alpha or intensity mapping, or are the modes they probe too different? | ||

+ | #*prospects and challenges for cluster mass calibration with CMB lensing? | ||

==Wiki navigation== | ==Wiki navigation== |

## Latest revision as of 08:52, 22 September 2015

## Delensing Details

Questions for discussion

- Experiment design
- Can we combine different experiments, and is it worth having two different noise levels on two experiments (high-res + low-res)

- Algorithms - Quadratic Estimator / Iterative / Sampling
- What is the best algorithm to use?
- How low ell do we use/need for reconstruction?

- Systematics and Delensing
- Dust foregrounds and sources - how do they propagate through the delensing procedure? How much do they matter?
- Instrumental systematics, higher order biases, LSS non-Gaussianity - any concerns for delensing?

- Analysis of Delensed Maps
- What are the statistical and noise properties of the delensed maps? How to construct likelihoods?

## CMB Lensing Cross-correlations

Questions for discussion:

- weak lensing calibration: cross-correlations with LSST / Euclid / ... weak lensing
- how precise are the correlations?
- is this level of multiplicative bias calibration interesting?
- are intrinsic alignments a limiting factor?

- clustering from correlations with DESI/Euclid/LSST galaxies / quasars / ...
- how well can biases be modeled and constrained?
- can these observables be used cleanly and powerful enough to detect neutrino mass?
- what are the key science drivers in extragalactic astrophysics?

- other surveys
- would overlap with external datasets gain from a northern site?
- is there a way to make use of cross-correlations with Ly-alpha or intensity mapping, or are the modes they probe too different?
- prospects and challenges for cluster mass calibration with CMB lensing?