{
  "input_measurements": "independent_cgm_results_v19_mos14to20keV_excluded_hi4pi_nh_per_pointing/independent_cgm_v19_all22_measurements.csv",
  "locatelli2024_all_variant_envelope": {
    "high": 1.6419087064176479,
    "low": 0.7278472061591317,
    "status": "sensitivity context only; not used as the Figure 3 MW interval"
  },
  "locatelli2024_reference_model": {
    "absolute_conversion_caveat": "Locatelli fitted an FWHM~80 eV-smoothed 0.614--0.694 keV O VIII-band photon intensity, not an absorbed broadband energy flux. The direct-EM target-APEC mapping before the response-matched emissivity closure is retained as a conversion check.",
    "figure3_interval_definition": "reference-model response-matched O VIII-band min--max across the 14 actual M31 fields",
    "geometry": "spherical beta plus exponential disk",
    "name": "combined_beta0p5_reference",
    "o8_line_anchor": {
      "locatelli_intrinsic_0p614_0p694_emissivity_ph_cm3_s": 1.649e-16,
      "multiplicative_scale": 0.9498760469603238,
      "purpose": "close the target APEC emissivity against Locatelli's FWHM~80 eV-smoothed O VIII-band emissivity before converting the reference density model to absorbed 0.4--1.25 keV",
      "target_apec_fwhm80ev_smoothed_0p614_0p694_emissivity_ph_cm3_s": 1.736015983640104e-16,
      "target_apec_raw_0p614_0p694_emissivity_ph_cm3_s": 1.3830941211252003e-16,
      "target_apec_z0p3_fwhm80ev_smoothed_emissivity_ph_cm3_s": 4.680098950051284e-16
    },
    "parameter_effects_on_side_balanced_fluxunit": {
      "c_norm": 0.013430364778265536,
      "height_scale_kpc": 0.08773704434707974,
      "n0": 0.312677840405408,
      "radial_scale_kpc": 0.22967651564161706
    },
    "parameter_error_caveat": "first-order independent propagation of published marginal errors; the posterior covariance was not published and the pale envelope is not a formal joint credible interval",
    "parameters": {
      "abundance_solar": 0.1,
      "beta": 0.5,
      "c_norm": 0.046,
      "height_scale_kpc": 1.1,
      "kT_keV": 0.15,
      "n0": 0.032,
      "radial_scale_kpc": 6.2
    },
    "published_table1_marginal_errors": {
      "c_norm": 0.001,
      "height_scale_kpc": 0.1,
      "n0": 0.004,
      "radial_scale_kpc": 0.4
    },
    "summary": {
      "all_inverse_variance": 1.6017123021968118,
      "direct_em_mapping_field_high": 1.7562567504318796,
      "direct_em_mapping_field_low": 1.506786801735674,
      "direct_em_mapping_side_balanced": 1.6419087064176479,
      "field_high": 1.6682262195476176,
      "field_low": 1.4312606908446712,
      "field_median": 1.6281438385312987,
      "field_p16": 1.5233072399338532,
      "field_p84": 1.648380043821046,
      "line_normalized_z0p3_all_inverse_variance": 1.520180919121114,
      "line_normalized_z0p3_field_high": 1.583341421939012,
      "line_normalized_z0p3_field_low": 1.358288481861019,
      "line_normalized_z0p3_side_balanced": 1.480205365076341,
      "north": 1.6080149355676707,
      "side_balanced": 1.5596097515217344,
      "south": 1.5112045674757981,
      "table1_independent_marginal_high": 1.9576008285155566,
      "table1_independent_marginal_low": 1.1616186745279122,
      "table1_independent_marginal_sigma": 0.3979910769938222
    }
  },
  "locatelli2024_variants": {
    "combined_20pct_instr": {
      "all_inverse_variance_primary_fluxunit": 1.573231837323961,
      "characteristic_primary_fluxunit": 1.5314063155792568,
      "contrast_slope_D_over_T": 0.06280068741388484,
      "north_primary_fluxunit": 1.5794930002434278,
      "south_primary_fluxunit": 1.4833196309150858
    },
    "combined_beta0p3": {
      "all_inverse_variance_primary_fluxunit": 1.5583214229598839,
      "characteristic_primary_fluxunit": 1.519797282566378,
      "contrast_slope_D_over_T": 0.058285531000689915,
      "north_primary_fluxunit": 1.5640883783802713,
      "south_primary_fluxunit": 1.4755061867524843
    },
    "combined_beta0p5": {
      "all_inverse_variance_primary_fluxunit": 1.686232964103489,
      "characteristic_primary_fluxunit": 1.6419087064176479,
      "contrast_slope_D_over_T": 0.06207345651526824,
      "north_primary_fluxunit": 1.692868180762576,
      "south_primary_fluxunit": 1.5909492320727199
    },
    "combined_beta0p7": {
      "all_inverse_variance_primary_fluxunit": 1.5997031840906333,
      "characteristic_primary_fluxunit": 1.5567470114689133,
      "contrast_slope_D_over_T": 0.06344844786248192,
      "north_primary_fluxunit": 1.6061336022650432,
      "south_primary_fluxunit": 1.5073604206727833
    },
    "combined_high_emissivity": {
      "all_inverse_variance_primary_fluxunit": 0.7468434444170229,
      "characteristic_primary_fluxunit": 0.7278472061591317,
      "contrast_slope_D_over_T": 0.06001238031829864,
      "north_primary_fluxunit": 0.7496871278339481,
      "south_primary_fluxunit": 0.7060072844843152
    },
    "combined_swcx": {
      "all_inverse_variance_primary_fluxunit": 1.4742333336518352,
      "characteristic_primary_fluxunit": 1.4352260608590215,
      "contrast_slope_D_over_T": 0.06249405999098338,
      "north_primary_fluxunit": 1.4800726126329948,
      "south_primary_fluxunit": 1.3903795090850484
    },
    "disk_like": {
      "all_inverse_variance_primary_fluxunit": 1.555022049924017,
      "characteristic_primary_fluxunit": 1.516526839735456,
      "contrast_slope_D_over_T": 0.05836736110307183,
      "north_primary_fluxunit": 1.560784674574126,
      "south_primary_fluxunit": 1.4722690048967864
    }
  },
  "primary_field_count": 14,
  "reference_footprint_output": "m31_cgmsum_locatelli2024_reference_beta0p5_m31_footprint_predictions.csv",
  "schema": "m31-cgmsum-conditional-prior-audit-v3",
  "software": {
    "astropy": "7.2.0",
    "numpy": "2.3.5",
    "pandas": "3.0.2",
    "python_sherpa": "4.18.0+2.ga0c5211a",
    "scipy": "1.17.1"
  },
  "sources": {
    "grayson2025_doi": "10.3847/1538-4357/ae100f",
    "henley_shelton2013_doi": "10.1088/0004-637X/773/2/92",
    "locatelli2024_doi": "10.1051/0004-6361/202347061",
    "pan2024_xleap1_doi": "10.3847/1538-4365/ad2ea0",
    "qu2024_xleap2_doi": "10.3847/1538-4357/ad31a0",
    "zhang2024_doi": "10.1051/0004-6361/202449412",
    "zhang2026_baryon_budget_doi": "10.1051/0004-6361/202556835"
  },
  "spectral_convention": {
    "absorbed_0p4_1p25_over_intrinsic_0p5_2p0": 0.7719222314291431,
    "abundance_table": "angr",
    "conversion_template_abundance_solar": 0.3,
    "conversion_template_kT_keV": 0.175306,
    "conversion_template_nh_1e22": 0.056,
    "cross_sections": "vern"
  }
}