{
 "item": "G-5",
 "n_truth": 21,
 "gate_passed": true,
 "ladder": [
  {
   "radius_scale": 1.0,
   "recovery_fraction": 0.8571,
   "n_recovered": 18,
   "expected_spurious_rotation": 0.394,
   "expected_spurious_offset": 0.103
  },
  {
   "radius_scale": 1.5,
   "recovery_fraction": 0.9524,
   "n_recovered": 20,
   "expected_spurious_rotation": 0.857,
   "expected_spurious_offset": 0.234
  },
  {
   "radius_scale": 2.5,
   "recovery_fraction": 1.0,
   "n_recovered": 21,
   "expected_spurious_rotation": 2.394,
   "expected_spurious_offset": 0.639
  }
 ],
 "misses_at_scale_1": [
  {
   "probe": "Q",
   "truth_id": "W104",
   "separation_arcsec": 0.3423,
   "published_D_over_Xerr": 1.04,
   "explained_by_source_table": true
  },
  {
   "probe": "L",
   "truth_id": "W106",
   "separation_arcsec": 0.6307,
   "published_D_over_Xerr": 2.03,
   "explained_by_source_table": true
  },
  {
   "probe": "R",
   "truth_id": "W198",
   "separation_arcsec": 0.4535,
   "published_D_over_Xerr": 1.42,
   "explained_by_source_table": true
  }
 ],
 "purity_note": "expected spurious counts are summed false-association probabilities over the whole probe set, so at scale 1.0 the recovered set of 18 carries an expected 0.39 (rotation) or 0.10 (offset) false entries.",
 "caveat": "the control catalogue was itself registered onto the radio frame using X-ray detections of 19 of these MSPs, so this is an optimistic bound on match performance."
}