# Reionization optical depth from the Planck 2018 baseline posterior.
# Planck Collaboration (2020), A&A 641, A6, arXiv:1807.06209, Table 1
# (TT,TE,EE+lowE).
#
# Despite the file name, this is *not* the low-l polarization alone:
# it is the full TT,TE,EE+lowE constraint, which already includes the
# high-l spectra. That makes it the right shorthand next to data that
# carry no CMB (or only the compressed distance priors, which do not
# depend on tau), and the wrong one next to plik_lite, which would
# count those spectra twice. Use tau_planck2018_lowe_only.txt
# ("planck2018_lowe" version, the default) there.
#
# [value] [sigma]   tau_reio
0.0544 0.0073
