Difference between revisions of "Map-based simulations for split and full bands"

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= Summary =
 
= Summary =
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This posting summarizes the results from map-based simulations for the DSR configuration with split bands and the closely related configuration with full bands. All simulations assume AL=0.082, and were run with the circular "3%" mask. The noise levels can be obtained from the DSR configuration summarized [https://cmb-s4.org/wiki/index.php/Expected_Survey_Performance_for_Science_Forecasting|here] by scaling to the circular mask. The noise levels for the full band configuration can be obtained from Victor Buza's [https://docs.google.com/spreadsheets/d/1_zATUnhYm03M9PW_Cer_s5EsX59txKvaBSdOVbyqxfU/edit#gid=0|spreadheet.] In practice, the 85/145 GHz tubes were traded for 95/155 GHz tubes and their sensitivities were converted to full-band 90/150 GHz using the NET ratios in the spreadsheet.
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In comparing the numerical values of these simulations with the Fisher forecasts, it should be kept in mind that the map-based simulations at present do not include filtering whereas the results reported for the Fisher forecasts do. According to Fisher forecasts, the effect of filtering degrades the constraints on r by approximately 35% for the DSR configuration, and one would expect a similar hit for map-based simulations that account for filtering.
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== Foreground model 02 ==
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{| class="wikitable" style="text-align: right; margin-left: 51px;"
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|  || sigma(r)  (before marginalization) || sigma(r) (after marginalization) || bias(r) (before marginalization)|| bias(r) (after marginalization)
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|-
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| split bands || 3.5e-4 || TBD || 1.6e-4 || TBD
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|-
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| full bands || 3.6e-4 || TBD|| 2.0e-4 || TBD
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|}
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== Foreground model 03 ==
 
== Foreground model 03 ==

Revision as of 02:14, 12 June 2020

Summary

This posting summarizes the results from map-based simulations for the DSR configuration with split bands and the closely related configuration with full bands. All simulations assume AL=0.082, and were run with the circular "3%" mask. The noise levels can be obtained from the DSR configuration summarized [1] by scaling to the circular mask. The noise levels for the full band configuration can be obtained from Victor Buza's [2] In practice, the 85/145 GHz tubes were traded for 95/155 GHz tubes and their sensitivities were converted to full-band 90/150 GHz using the NET ratios in the spreadsheet.

In comparing the numerical values of these simulations with the Fisher forecasts, it should be kept in mind that the map-based simulations at present do not include filtering whereas the results reported for the Fisher forecasts do. According to Fisher forecasts, the effect of filtering degrades the constraints on r by approximately 35% for the DSR configuration, and one would expect a similar hit for map-based simulations that account for filtering.

Foreground model 02

sigma(r) (before marginalization) sigma(r) (after marginalization) bias(r) (before marginalization) bias(r) (after marginalization)
split bands 3.5e-4 TBD 1.6e-4 TBD
full bands 3.6e-4 TBD 2.0e-4 TBD


Foreground model 03

sigma(r) (before marginalization) sigma(r) (after marginalization) bias(r) (before marginalization) bias(r) (after marginalization)
split bands 3.5e-4 3.4e-4 1.5e-4 1.3e-4
full bands 3.6e-4 3.4e-4 1.9e-4 1.5e-4

Split band configuration

Frequency (GHz) 20 30 40 85 95 145 155 220 270
Beam FWHM (arcmin) 11.0 72.8 72.8 25.5 22.7 25.5 22.7 13.0 13.0
noise T (uK-arcmin) 13.33 6.30 7.97 1.57 1.38 3.03 3.24 8.37 14.35
l_knee T 700 150 150 150 150 230 230 230 230
exponent T -4.4 -4.4 -4.4 -4.4 -4.4 -3.8 -3.8 -3.8 -3.8
noise E (uK-arcmin) 9.42 4.18 5.28 1.04 0.92 1.40 1.50 3.89 9.02
l_knee E 200 60 60 60 60 65 65 65 65
exponent E -2.2 -2.2 -2.2 -2.2 -2.2 -3.1 -3.1 -3.1 -3.1
noise B (uK-arcmin) 9.42 3.94 4.98 0.98 0.87 1.37 1.50 3.89 6.67
l_knee B 200 60 60 60 60 60 60 60 60
exponent B -1.7 -1.7 -1.7 -1.7 -1.7 -3.0 -3.0 -3.0 -3.0

Full band configuration

Frequency (GHz) 20 30 40 90 150 220 270
Beam FWHM (arcmin) 11.0 72.8 72.8 24.1 24.1 13.0 13.0
noise T (uK-arcmin) 13.33 6.30 7.97 0.89 1.97 8.37 14.35
l_knee T 700 150 150 200 200 230 230
exponent T -4.4 -4.4 -4.4 -4.4 -3.8 -3.8 -3.8
noise E (uK-arcmin) 9.42 4.18 5.28 0.59 0.90 3.89 9.02
l_knee E 200 60 60 60 65 65 65
exponent E -2.2 -2.2 -2.2 -2.2 -3.1 -3.1 -3.1
noise B (uK-arcmin) 9.42 3.94 4.98 0.56 0.90 3.89 6.67
l_knee B 200 60 60 60 60 60 60
exponent B -1.7 -1.7 -1.7 -1.7 -3.0 -3.0 -3.0