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      "fraction_of_ceiling": 0.9125315088515247
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  "continuous_threshold_not_camera_recommendation": [
    {
      "scenario": "background-rich",
      "exposure_for_95pct_ceiling_s": 7.49394533502479
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    {
      "scenario": "read-noise-sensitive",
      "exposure_for_95pct_ceiling_s": 6694.3681318681265
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  ],
  "assumptions": [
    "Independent Poisson source, sky, dark counts",
    "Gaussian independent read noise per pixel per read",
    "No gain conversion needed: all inputs in electrons",
    "Linear unsaturated detector, fixed aperture, equal weights, no rejected frames",
    "No read overhead, tracking, cosmic rays, resampling correlation or estimated-sky variance"
  ],
  "uncertainty": "Deterministic expected-noise model, not a fitted estimate or measured benchmark; no empirical uncertainty intervals."
}