Difference between revisions of "Summary LFI"
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{{DISPLAYTITLE:Summary of LFI data characteristics}} | {{DISPLAYTITLE:Summary of LFI data characteristics}} | ||
| − | Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper {{PlanckPapers|planck2014-a03 | + | Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper {{PlanckPapers|planck2014-a03}}. |
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<sup>a</sup> Determined by fitting Jupiter observations directly in the timelines. | <sup>a</sup> Determined by fitting Jupiter observations directly in the timelines. | ||
| − | <sup>b</sup> Calculated from the main beam solid angle of the effective beam, Ω<sub>eff</sub> = mean(Ω). These values are used in the source extraction pipeline ({{PlanckPapers|planck2014-a35 | + | <sup>b</sup> Calculated from the main beam solid angle of the effective beam, Ω<sub>eff</sub> = mean(Ω). These values are used in the source extraction pipeline ({{PlanckPapers|planck2014-a35}}). |
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<sup>d</sup> Values derived from fitting noise spectra. | <sup>d</sup> Values derived from fitting noise spectra. | ||
| − | <sup>e</sup> Sum of the error on the estimation of the calibration constant (0.25 %) and the square root of the squared sum of the following errors: beam uncertainty; sidelobe convolution effect; and unknown systematics as measured from the power spectrum at 50 < ℓ < 250, see {{PlanckPapers|planck2014-a05 | + | <sup>e</sup> Sum of the error on the estimation of the calibration constant (0.25 %) and the square root of the squared sum of the following errors: beam uncertainty; sidelobe convolution effect; and unknown systematics as measured from the power spectrum at 50 < ℓ < 250, see {{PlanckPapers|planck2014-a05}}. |
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| − | <sup>f</sup> Peak-to-peak difference between 99% and 1% quantities in the pixel value distributions from simulated maps, see {{PlanckPapers|planck2014-a03 | + | <sup>f</sup> Peak-to-peak difference between 99% and 1% quantities in the pixel value distributions from simulated maps, see {{PlanckPapers|planck2014-a03}}. |
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Revision as of 10:11, 26 September 2016
Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper Planck-2015-A02[1].
| Parameter | 30 GHz | 44 GHz | 70 GHz |
|---|---|---|---|
| Centre frequency [GHz] | 28.4 | 44.1 | 70.4 |
| Scanning beam FWHMa [arcmin] | 33.10 | 27.94 | 13.08 |
| Scanning beam ellipticitya | 1.37 | 1.25 | 1.27 |
| Effective beam FWHMb [arcmin] | 32.29 | 27.00 | 13.21 |
| White noise level in mapc [μKCMB] | *TBD | *TBD | *TBD |
| White noise level in timelinesd [μKCMB s1/2] | 148.1 | 174.2 | 152.0 |
| fkneed [mHz] | 114.1 | 52.4 | 19.7 |
| 1/f sloped | -0.92 | -0.88 | -1.20 |
| Overall calibration uncertaintye [%] | 0.35 | 0.26 | 0.29 |
| Systematic effects uncertainty in Stokes I f [μKCMB] | 0.88 | 1.97 | 1.87 |
| Systematic effects uncertainty in Stokes Q f [μKCMB] | 1.11 | 1.14 | 2.25 |
| Systematic effects uncertainty in Stokes U f [μKCMB] | 0.95 | 1.29 | 2.22 |
a Determined by fitting Jupiter observations directly in the timelines.
b Calculated from the main beam solid angle of the effective beam, Ωeff = mean(Ω). These values are used in the source extraction pipeline (Planck-2015-A26[2]).
c White noise per pixel computed from half-ring difference maps. These values are within 1% of the white noise sensitivity computed directly on the timelines, taking into account the actual integration time represented in the maps.
d Values derived from fitting noise spectra.
e Sum of the error on the estimation of the calibration constant (0.25 %) and the square root of the squared sum of the following errors: beam uncertainty; sidelobe convolution effect; and unknown systematics as measured from the power spectrum at 50 < ℓ < 250, see Planck-2015-A04[3].
f Peak-to-peak difference between 99% and 1% quantities in the pixel value distributions from simulated maps, see Planck-2015-A02[1].
References[edit]
- ↑ 1.01.1 Planck 2015 results. II. LFI processing, Planck Collaboration, 2016, A&A, 594, A2.
- ↑ Planck 2015 results. XXVI. The second Planck catalogue of compact sources, Planck Collaboration, 2016, A&A, 594, A26.
- ↑ Planck 2015 results. IV. LFI beams and window functions, Planck Collaboration, 2016, A&A, 594, A4.
(Planck) Low Frequency Instrument
Full-Width-at-Half-Maximum
Cosmic Microwave background
To be defined / determined
