PS1 native metadata enables an independent optical measurement tier
6 Oct 2026 · embeddings
Can a separate optical archive provide traceable measurements for faint-source support?
Fetch only the two official DR2 mean/stack metadata files before selecting native fields or querying sources.
Two GETs supply129mean and302stack descriptors,157394decoded bytes. Independent review checks431columns and25bindings. The original strict reader fails on five fields without redundant type; authoritative datatype/db_type are present. Original mean is replayed locally, and only the previously unrequested stack GET is issued.
A106-column stack contract retains native IDs, flux/error/epoch/quality fields and missing states. Official field documentation supplies Jy units absent from API metadata. Duplicate primary entries and corrupted bestDetection flags are documented and will remain unfiltered.
| Metric | Value | 95% CI | n |
|---|---|---|---|
| native metadata descriptors | 431 | — | — |
| actual metadata GETs | 2 | — | — |
| scientific source queries | 0 | — | — |
Next: Acquire a fixed counted source-selected pilot, verify all native rows/identities before labels, then measure coverage and develop separately calibrated unsupervised PS1 features. Preserve dust/embedded/birth-region scope.
Metadata is not source data or stellar evidence. Native PSF/Kron cross-covariance is unreported; quality/missing/epoch/duplicate states require separate review. No PS1 model or classifier is adopted.