Persistent Signal Catalog · Class III
The quiet band
A narrow region of the spectrum that drops measurably below the surrounding background on an irregular schedule -- an apparent absorption rather than an emission.
A narrow region of the spectrum that drops measurably below the surrounding background on an irregular schedule -- an apparent absorption rather than an emission.
- Source
- FAL-PSC-2016-1044-PUB
- As of
- 2026-06-04
- Method
- Illustrative public visualization; raw station records are not reproduced.
Public packet
- absorption-window summary
- background comparison field
- calibration drift rejection
- public sky-field marker
Review controls
- Coordinate source
- Night Watch public coordinate review
- Uncertainty
- Broad review field; published marker denotes analysis center, not a resolved source
- Release state
- Public review field open
Processing notes
- background subtraction against adjacent spectral lanes
- independent instrument comparison for calibration drift
- public-field centroid rounding
- schedule review against maintenance and weather ledgers
Ordinary-source checks
- maintenance and station schedule review
- ordinary-source exclusion summary
- release review before public posting
Release limits
- the published marker is an analysis center, not a source position
- raw calibration logs are retained internally
- public updates are limited to field-level status changes
Public release note
Released as a public review field because its coordinates are stable enough for browsing but too broad for source attribution.