PLANCK 2018 CANONICAL PARAMETER RECORD
Cosmological Boundary Routing — Dataset C
========================================================================

Planck release: PR3 2018
Model/likelihood tag: base_plikHM_TTTEEE_lowl_lowE
Canonical trajectory values: best-fit values from .minimum
Uncertainty record: posterior means and 68% limits from .margestats
T_CMB used for Omega_r derivation: 2.7255 K
N_eff used for Omega_r derivation: 3.046

H0
  source parameter : H0
  best fit        : 67.32178
  posterior mean  : 67.273386
  sddev           : 0.60408851
  68% interval    : [66.67725, 67.87354] (two)
  unit            : km s^-1 Mpc^-1
  status          : direct

omegabh2
  source parameter : omegabh2
  best fit        : 0.02237737
  posterior mean  : 0.022359766
  sddev           : 0.00014879512
  68% interval    : [0.02221168, 0.02250948] (two)
  unit            : dimensionless
  status          : direct

omegach2
  source parameter : omegach2
  best fit        : 0.1201035
  posterior mean  : 0.12020012
  sddev           : 0.0013661962
  68% interval    : [0.1188457, 0.1215568] (two)
  unit            : dimensionless
  status          : direct

Omega_m
  source parameter : omegam
  best fit        : 0.3157967
  posterior mean  : 0.3165504
  sddev           : 0.0084223128
  68% interval    : [0.308213, 0.3248517] (two)
  unit            : dimensionless
  status          : direct

Omega_Lambda
  source parameter : omegal
  best fit        : 0.6842033
  posterior mean  : 0.6834496
  sddev           : 0.0084223128
  68% interval    : [0.6751483, 0.691787] (two)
  unit            : dimensionless
  status          : direct

n_s
  source parameter : ns
  best fit        : 0.9658923
  posterior mean  : 0.96485764
  sddev           : 0.004368361
  68% interval    : [0.9605454, 0.9691619] (two)
  unit            : dimensionless
  status          : direct

ln_1e10_A_s
  source parameter : logA
  best fit        : 3.044726
  posterior mean  : 3.0447363
  sddev           : 0.015912876
  68% interval    : [3.029265, 3.060084] (two)
  unit            : dimensionless
  status          : direct

tau
  source parameter : tau
  best fit        : 0.05430138
  posterior mean  : 0.054445976
  sddev           : 0.0078745461
  68% interval    : [0.046361462, 0.06144044] (two)
  unit            : dimensionless
  status          : direct

sigma8
  source parameter : sigma8
  best fit        : 0.8119545
  posterior mean  : 0.81197768
  sddev           : 0.0073327667
  68% interval    : [0.8048177, 0.8191755] (two)
  unit            : dimensionless
  status          : direct

age
  source parameter : age
  best fit        : 13.79731
  posterior mean  : 13.799703
  sddev           : 0.024035288
  68% interval    : [13.77589, 13.82329] (two)
  unit            : Gyr
  status          : direct

A_s
  source parameter : logA
  best fit        : 2.10042752429e-09
  posterior mean  : 2.10044915881e-09
  sddev           : 
  68% interval    : [2.06820257126e-09, 2.13293487521e-09] (two)
  unit            : dimensionless
  status          : derived
  derivation      : A_s = exp(logA) * 1e-10

omega_r
  source parameter : H0,nnu
  best fit        : 4.1769773884e-05
  posterior mean  : 
  sddev           : 
  68% interval    : [, ]
  unit            : dimensionless
  status          : derived
  derivation      : omega_gamma=2.469e-5*(T_CMB/2.7255)^4; omega_r=omega_gamma*(1+0.22710731766*N_eff)

Omega_r
  source parameter : H0,nnu
  best fit        : 9.21617990232e-05
  posterior mean  : 
  sddev           : 
  68% interval    : [, ]
  unit            : dimensionless
  status          : derived
  derivation      : Omega_r = omega_r / h^2, h = H0 / 100

NOTES
- Direct parameters are read from official Planck GetDist outputs.
- A_s is derived from logA = ln(10^10 A_s).
- Omega_r uses the photons + relativistic-neutrino approximation and is not a directly tabulated Planck chain parameter.
- The deterministic Dataset C trajectory should read the best_fit column only.
- Posterior means and intervals are retained for later robustness and Monte Carlo analysis.
