{
  "band_contrast_audit": {
    "all_below_threshold": true,
    "maximum_absolute_sigma": 2.25801655576,
    "maximum_signed_sigma": 2.25801655576,
    "minimum_signed_sigma": -0.861110840106,
    "n_definitions": 30,
    "negative_contrast_count": 6,
    "positive_contrast_count": 24,
    "predeclared_rule_result": "pass",
    "primary": {
      "band_hi_micron": 4.6,
      "band_id": "B3_primary",
      "band_lo_micron": 4.1,
      "band_points": 745,
      "continuum_hi_micron": 3.9,
      "continuum_id": "C2_primary",
      "continuum_lo_micron": 3.6,
      "continuum_points": 278,
      "contrast_error_ppm": 23.1632856701,
      "contrast_ppm": 4.07090793361,
      "signed_sigma": 0.175748293726
    },
    "threshold_absolute_sigma": 3.0
  },
  "execution": {
    "definition": "Frozen implementation checkpoint recorded before evidence generation.",
    "git_dirty": false,
    "git_revision": "82d53f44b0e6c1f460232531c3bfac4035d3b172"
  },
  "generated_date": "2026-09-23",
  "implementation_revision": "82d53f44b0e6c1f460232531c3bfac4035d3b172",
  "miri_dataset": {
    "canonical_sha256": "1b0959ba7513ee2c4ff14b8c6060cec05670a547d85f1fd99b8a6fb6eae0e7c2",
    "display_offset_ppm": 160.0,
    "instrument": "MIRI LRS",
    "n_nonoverlap_bins": 27,
    "n_published_bins": 28,
    "wavelength_max_micron": 11.875,
    "wavelength_min_micron": 5.125
  },
  "miri_flatness_audit": {
    "all_nonoverlap_bins": {
      "chi_square": 54.1623845827,
      "degrees_of_freedom": 26,
      "p_value": 0.000968436847859,
      "reduced_chi_square": 2.08316863779,
      "weighted_mean_error_ppm": 16.2378114023,
      "weighted_mean_ppm": 2740.15665439
    },
    "alpha": 0.05,
    "leave_one_out_max_p_value": 0.0783199508278,
    "leave_one_out_min_p_value": 0.000633005948476,
    "most_influential_removed_wavelength_micron": 5.375,
    "n_leave_one_out_fits": 27,
    "predeclared_rule_result": "fail",
    "rejections_after_deletion": 26,
    "robust_to_every_one_bin_deletion": false
  },
  "nir_dataset": {
    "canonical_sha256": "0622a1761cbd1e8f920425fd0b54b9489517f66f0a885ed8190cfc0471aedf24",
    "instruments": [
      "NIRISS SOSS",
      "NIRSpec G395H"
    ],
    "n_points": 4411,
    "wavelength_max_micron": 5.17429208755,
    "wavelength_min_micron": 0.852268261537
  },
  "provenance": {
    "archive_file": "Spectra.zip",
    "archive_md5": "fb6453bba9e0dd2a94bb741c0777418c",
    "miri_file_in_archive": "Spectra/K2-18b_miri_lrs_eureka_taurex.txt",
    "nir_file_in_archive": "Spectra/K2-18b_both_offset1_-41ppm_native.txt",
    "record_url": "https://zenodo.org/records/16277833",
    "zenodo_record": "10.5281/zenodo.16277833"
  },
  "research_question": "Does the descriptive 4.3 micron CO2-band contrast remain below 3 sigma across declared wavelength-window choices, and is MIRI non-flatness robust to deletion of any one published bin?",
  "scope": "Descriptive sensitivity and influence audit; not an atmospheric retrieval or molecular detection test.",
  "study_id": "k218b-band-definition-and-miri-influence-v1"
}