# Difference between revisions of "SLAC-2017:Foregrounds"

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=== r: Lloyd Knox === | === r: Lloyd Knox === | ||

+ | |||

+ | * From Science Book, expect two distinct surveys for r: one at low resolution with many frequencies (for tensors), one with high resolution but fewer frequencies (for delensing) | ||

+ | * Defined a staged series of data challenges. Simulated maps exist at NERSC, analysis of first data challenge is underway. Start simple, update survey and signals in later rounds. | ||

+ | * Science Book used Fisher forecast to allocate sensitivity between eight frequency bands for low-res survey plus high-res survey. | ||

+ | * Important question: Do we need additional frequencies below 30 GHz? | ||

+ | * Survey definitions: | ||

+ | ** X=1: Science Book case with fsky=3% (check codes to confirm that we can reproduce Science Book results) | ||

+ | ** X=2: Updated set of bandpasses, multiple values of fsky. | ||

+ | ** X=3: Include both low-res and high-res surveys | ||

+ | * Signal definitions: | ||

+ | ** Y=0: Lensed and partially-delensed CMB, Gaussian dust and synchrotron, no extragalactic foregrounds | ||

+ | ** Y=1: PySM 'standard' model = Galactic foregrounds (non-Gaussian, spatially varying indices for sync/dust), no extragalactic foregrounds | ||

+ | ** Y=2: PySM 'alternate' model | ||

+ | ** Y>2: Ben Thorne and Brandon Hensley working to add Hensley / Drain dust model, add extragalactic foregrounds consistent with CMB lensing (Alvarez/Battaglia/Bond) | ||

=== TT/TE/EE: Erminia Calabrese === | === TT/TE/EE: Erminia Calabrese === |

## Revision as of 19:02, 27 February 2017

Back to SLAC-2017 main page

## Contents

## Foregrounds and simulations

Post talks here:

- r -- Lloyd Knox slides
- TT/TE/EE -- Erminia Calabrese slides
- Lensing -- Blake Sherwin slides
- Clusters -- Colin Hill slides

## Notes from session

Take notes here.

### r: Lloyd Knox

- From Science Book, expect two distinct surveys for r: one at low resolution with many frequencies (for tensors), one with high resolution but fewer frequencies (for delensing)
- Defined a staged series of data challenges. Simulated maps exist at NERSC, analysis of first data challenge is underway. Start simple, update survey and signals in later rounds.
- Science Book used Fisher forecast to allocate sensitivity between eight frequency bands for low-res survey plus high-res survey.
- Important question: Do we need additional frequencies below 30 GHz?
- Survey definitions:
- X=1: Science Book case with fsky=3% (check codes to confirm that we can reproduce Science Book results)
- X=2: Updated set of bandpasses, multiple values of fsky.
- X=3: Include both low-res and high-res surveys

- Signal definitions:
- Y=0: Lensed and partially-delensed CMB, Gaussian dust and synchrotron, no extragalactic foregrounds
- Y=1: PySM 'standard' model = Galactic foregrounds (non-Gaussian, spatially varying indices for sync/dust), no extragalactic foregrounds
- Y=2: PySM 'alternate' model
- Y>2: Ben Thorne and Brandon Hensley working to add Hensley / Drain dust model, add extragalactic foregrounds consistent with CMB lensing (Alvarez/Battaglia/Bond)

### TT/TE/EE: Erminia Calabrese

### Lensing: Blake Sherwin

### Clusters: Colin Hill

## Action items/Next steps

Summarize action items here