Most retained outliers involve something appearing where there should be nothing. FA-1044 is the opposite: a narrow band that, on an irregular schedule, drops measurably below the surrounding background level -- an apparent absorption rather than an emission, which is unusual enough to keep it under study.
The effect is small and would be easy to dismiss as a calibration artifact, except that it appears across independent instruments and does not follow any maintenance or interference cycle the Laboratories can find. It is held as unresolved.
What the public record includes
Review field opened
A narrow recurring absence is separated from ordinary spectral background variation.
Calibration drift review
Independent instruments show the same public behavior after calibration checks.
Public field assessment
Coordinates are judged stable enough for a broad review field, but not for source attribution.
Night Watch release
Public field marker and release note are added to the catalog.
Review method
- Background subtraction against adjacent spectral lanes.
- Independent instrument comparison for calibration drift.
- Maintenance and weather ledger review.
- Broad-field centroid rounding for public browsing.
Ordinary sources checked
- calibration drift
- scheduled instrument blanking
- local power event
- weather-correlated attenuation
- Published marker is an analysis center, not a source position.
- Raw calibration logs remain internal.
- Public updates are limited to field-level status changes.