Several ngmix-module options ship off by default, pending real-data evidence — the design contract is that production defaults flip here, on data, never in the implementing PR. Each sub-issue is one A/B question with a named metric and a named decider.
Current options awaiting a verdict:
The decisive statistics (B-modes, leakage) need real area, which is why this lives in the First run on data (Nibi) milestone: the A/B runs are consumers of the P3 footprint (#801, #808) — pipeline run twice (or more) with config variants only, matched catalogues compared through the sp_validation machinery. Complementary evidence from image simulations (calibrated m/c truth) rides UNIONS-WL/MultiBand_ImSim#1.
Methodology (area needed, patch choice, matched-object vs matched-area comparison) needs group design — to discuss on a tomography call before the runs are scheduled.
— Claude, on behalf of Cail
Several ngmix-module options ship off by default, pending real-data evidence — the design contract is that production defaults flip here, on data, never in the implementing PR. Each sub-issue is one A/B question with a named metric and a named decider.
Current options awaiting a verdict:
BLEND_HANDLING = uberseg(ngmix: config-selectable UberSeg neighbour masking (BLEND_HANDLING) #770 / UberSeg neighbour masking (Erin Sheldon) — config-selectable, validated against noise-fill #776) — UberSeg neighbour masking vs the historical noise-fill.azgaussvs fiducialfitgauss(A/B: azgauss vs fitgauss metacal reconvolution kernel #830) — noise-robust variant ofgauss, selectable via theMETACAL_PSFknob added in Selectable metacal reconvolution kernel + azgauss; bump ngmix v2.4.1 #829 (mechanism tracked separately as Update ngmix v2.4.0 → v2.4.1; expose metacal reconvolution kernel as config knob #819).The decisive statistics (B-modes, leakage) need real area, which is why this lives in the First run on data (Nibi) milestone: the A/B runs are consumers of the P3 footprint (#801, #808) — pipeline run twice (or more) with config variants only, matched catalogues compared through the sp_validation machinery. Complementary evidence from image simulations (calibrated m/c truth) rides UNIONS-WL/MultiBand_ImSim#1.
Methodology (area needed, patch choice, matched-object vs matched-area comparison) needs group design — to discuss on a tomography call before the runs are scheduled.
— Claude, on behalf of Cail