Instrument |
LFI | HFI | |||||||
Center frequency [GHz] | 30 | 44 | 70 | 100 | 143 | 217 | 353 | 545 | 857 |
Number of polarised detectorsa | 4 | 6 | 12 | 8 | 8 | 8 | 8 | ||
Number of unpolarised detectors | 4 | 4 | 4 | 4 | 4 | ||||
Meanb FWHM (arcmin) | 32.7 | 29.5 | 13.0 | 9.6 | 7.0 | 4.6 | 4.5 | 4.7 | 4.3 |
Meanc ellipticity | 1.36 | 1.50 | 1.27 | 1.17 | 1.05 | 1.11 | 1.13 | 1.03 | 1.04 |
Bandwidth (![]() |
4.5 | 4.1 | 12 | 32 | 45 | 68 | 104 | 174 | 258 |
![]() |
3.3 | 5.2 | 8.9 | 3 | 2.2 | 4.8 | 2.0 | 150 | 6000 |
![]() |
4.6 | 7.4 | 12.7 | 4.8 | 4.1 | 9 | 38 | ||
Point source sensitivityf
(1![]() |
22 | 59 | 46 | 14 | 10 | 14 | 38 | 44 | 45 |
Notes. (a) For the LFI, the values shown correspond to the output of a
linearly polarised differential radiometer; two such outputs, referred to as ``detectors'' in this
paper, are supported by each horn. In fact each of the two radiometer outputs from one horn is built
from the data acquired by two diodes, each of which are switched at high frequency between the sky
and a blackbody load at 4 K (see Bersanelli et al. 2010). For the HFI, a (polarised) detector is taken to be
the output of one of a pair of linearly polarised polarisation-sensitive bolometers; each horn
contains one pair, i.e. two orthogonally-polarised detectors. Unpolarised spider-web bolometers are
present in some of the horns, in these cases there is only one detector per horn. See
Lamarre et al. (2010).
protect
(b) Band-averaged, including polarised and unpolarised detectors, see Tauber et al. (2010).
protect
(c) Band-averaged, including polarised and unpolarised detectors, see Tauber et al. (2010).
protect
(d) In K/K (thermodynamic temperature) for 15 months
integration,
,
for square pixels whose sides are given in the row ``Mean FWHM''. The
instantaneous sensitivities used for these estimates are drawn from ground calibration, averaged for
all detectors in each channel; for LFI the sensitivity is the mean of the two methods described in
Mennella et al. (2010).
protect
(e)
.
protect
(f) Not including background confusion. Estimates of confusion levels can be extracted from Leach et al. (2008).
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.