CMB Benchmarks

CosmicFishPie includes a basic CMB Fisher path for the observables:

CMB_T
CMB_E
CMB_B

The CMB implementation uses a single ell range (lmin_CMB, lmax_CMB) for all spectra. Separate TT/TE/EE ranges and lensing spectra (e.g. phi-phi) are not implemented yet.

Survey Spec YAMLs

The following example CMB experiment specifications are shipped as survey spec YAMLs:

cosmicfishpie/configs/default_survey_specifications/Planck.yaml
cosmicfishpie/configs/default_survey_specifications/Simons-Observatory-PlanckLowEll.yaml
cosmicfishpie/configs/default_survey_specifications/CMB-Stage4-PlanckLowEll.yaml

For Simons Observatory and Stage-IV, we use a conservative common lmax_CMB=3000 as an approximation.

Run A Single CMB Fisher (Smoke)

Use the CAMB backend and a spec YAML:

uv run python scripts/run_cmb_fisher_smoke.py \
  --code camb \
  --spec-yaml cosmicfishpie/configs/default_survey_specifications/Planck.yaml \
  --observables CMB_T,CMB_E \
  --outdir tmp/cmb_planck_smoke \
  --write-enabled-yaml

Tips:

Use --lmax 120 for a fast end-to-end smoke.
--write-enabled-yaml writes a copy of the CAMB YAML with CMB outputs enabled into the output directory for provenance.

Run The Standard Presets

uv run python scripts/run_cmb_benchmarks.py \
  --outdir tmp/cmb_bench \
  --which planck,so,s4