Planck 2015 results - II. Low Frequency Instrument data processings

Planck 2015 results

Free Access

Table 1

LFI performance parameters.

Parameter	30 GHz	44 GHz	70 GHz

Centre frequency [GHz] .................................................................................	28.4	44.1	70.4
Scanning beam FWHM^a [arcmin] ..........................................	33.10	27.94	13.08
Scanning beam ellipticity^a .......................................................	1.37	1.25	1.27
Effective beam FWHM^b [arcmin] ..........................................	32.29	27.00	13.21
White noise level in timelines^c [ μK_CMB s^1/2] ...........	148.1	174.2	152.0
f_knee^c [mHz] ....................................................................	114	52	19
1 /f slope^c ....................................................................	−0.92	−0.88	−1.20
Overall calibration uncertainty^d [%] ..........................................	0.35	0.26	0.20
Systematic effects uncertainty in Stokes I^e [ μK_CMB] .	0.88	1.97	1.87
Systematic effects uncertainty in Stokes Q^e [μK_CMB] .	1.11	1.14	2.25
Systematic effects uncertainty in Stokes U^e [μK_CMB] .	0.95	1.20	2.22

Notes.

^(a)

Determined by fitting Jupiter observations directly in the timelines.

^(b)

Calculated from the main beam solid angle of the effective beam (Sect. 6.2). These values are used in the source extraction pipeline (Planck Collaboration XXVI 2016).

^(c)

Typical values derived from fitting noise spectra (Sect. 8.1).

^(d)

Sum of the error determined from the absolute and relative calibration, see Planck Collaboration IV (2016).

^(e)

Peak-to-peak difference between 99% and 1% quantiles in the pixel value distributions from simulated maps (see Planck Collaboration III 2016).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.