{
  "challenge_id": "et_dimensional_thaw_v1",
  "version": "1.0.0",
  "frequency_grid": {
    "f_min_hz": 3.0,
    "f_max_hz": 3000.0,
    "n_bins": 400,
    "spacing": "log10"
  },
  "bbh_model": {
    "omega_ref": 1.1e-09,
    "f_ref_hz": 25.0,
    "slope": 0.6666666666666666
  },
  "thaw_model": {
    "f_star_hz": 50.0,
    "n_ir": 0.0,
    "q_uv_star": 3.0,
    "n_uv_map": "n_uv = 4 * (4 - q_uv_star)",
    "n_uv": 4.0
  },
  "noise_model": {
    "type": "gaussian_per_bin",
    "sigma_rule": "sigma_i = eta_noise * Omega_PI(f_i)",
    "default_eta_noise": 1.0
  },
  "signal_amplitude_rule": {
    "type": "omega_star = M * Omega_PI(f_star)",
    "tiers": {
      "A": 0.3,
      "B": 1.0,
      "C": 3.0,
      "D": 10.0
    },
    "omega_pi_f_star_hz": 2.5000037460379855e-11,
    "pi_envelope_note": "omega_pi_analytic: 2.5e-11 * (f/50)^0.2"
  }
}