#829 exposes the metacal reconvolution kernel as a config knob (METACAL_PSF), defaulting to the fiducial fitgauss. azgauss (new in ngmix v2.4.1, pinned in #819) is pitched as a noise-robust drop-in replacement — worth an A/B before flipping the default.
Question: does azgauss change recovered m/c bias relative to fitgauss, and is it worth adopting as fiducial?
Mechanism: METACAL_PSF = azgauss vs fitgauss, digital-twin / image-sim comparison (calibrated m/c truth) per #813's methodology, complementary to real-data area once available.
— Claude, on behalf of Cail
#829 exposes the metacal reconvolution kernel as a config knob (
METACAL_PSF), defaulting to the fiducialfitgauss.azgauss(new in ngmix v2.4.1, pinned in #819) is pitched as a noise-robust drop-in replacement — worth an A/B before flipping the default.Question: does
azgausschange recovered m/c bias relative tofitgauss, and is it worth adopting as fiducial?Mechanism:
METACAL_PSF = azgaussvsfitgauss, digital-twin / image-sim comparison (calibrated m/c truth) per #813's methodology, complementary to real-data area once available.— Claude, on behalf of Cail