{
  "plate": "pi4197-98",
  "families": [
    {
      "offset_native": [
        59.118646995211975,
        -0.790510075425118
      ],
      "catalog_pairs": 13,
      "models": [],
      "holdout_scope": "Entire exposure pairs held out; same catalog identities for all coordinate choices",
      "note": "This smaller, cleaner subset is not directly comparable to earlier full-sample residual summaries. Epoch proper motions remain uncorrected."
    },
    {
      "offset_native": [
        44.06448576114053,
        0.7957257778936082
      ],
      "catalog_pairs": 0,
      "status": "Too few catalog pairs for comparison"
    }
  ],
  "interpretation": "Image duplication requires exposure-aware centroids before a physical distortion claim; no new model is installed by this diagnostic"
}