# Reionization optical depth from Planck 2018 large-scale E-mode
# polarization *alone* (the "lowE"/SimAll likelihood).
# Planck Collaboration (2020), A&A 641, A6, arXiv:1807.06209:
# tau = 0.0506 +- 0.0086 from lowE.
#
# This is the version to pair with plik_lite ("planck_lite"). plik_lite
# covers l >= 30, where tau enters through the exp(-2 tau) damping and
# is degenerate with A_s; this prior breaks the degeneracy and adds
# nothing plik_lite already contains. The familiar 0.0544 +- 0.0073
# ("planck2018" version) is the TT,TE,EE+lowE posterior -- it already
# includes the high-l spectra, so combining it with plik_lite counts
# them twice.
#
# [value] [sigma]   tau_reio
0.0506 0.0086
