# Chicago-Carnegie Hubble Program: the tip of the red giant branch,
# calibrated with HST and JWST, tied to 24 SNe Ia -- a distance ladder
# with no Cepheids in it.
# Freedman et al. (2024), arXiv:2408.06153.
#
# Reported as H0 = 70.39 +/- 1.22 (stat) +/- 1.33 (sys) +/- 0.70
# (sigma_SN). The three are independent, so sigma below is their sum
# in quadrature, sqrt(1.22^2 + 1.33^2 + 0.70^2) = 1.94.
#
# [value] [sigma]   H0 in km/s/Mpc
70.39 1.94
