Fig. 7
Two-dimensional distribution function of 
and polarization fraction p for the Ophiuchus field. The angle
dispersion function
is computed at a lag δ =
16′. Only pixels for which p/σp>
3 are retained. The dashed grey line is the large-scale fit (with
FWHM =
1° and 
)
, the solid black line shows
the mean
for each bin in p (the bin size is Δlog (p) = 0.008) and
the dashed black line is a linear fit of that curve in log-log space, restricted to
bins in p which contain at least 1% of the total number
of points (so about 150 points per bin).
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