CASE-1270 UNRESOLVED opened 2014-12-02 · last reviewed 2024-09-17

The Periodicity

An investigation assembled from timing residuals, recovered survey data, and independent notes that share a 1,270-second interval. The correlation is the subject. The cause is not claimed.

Uncertainty is part of the file. Findings remain subject to review.

Lead
Directorate III
Status
UNRESOLVED
Opened
2014-12-02
Last reviewed
2024-09-17

Known

  • A 1,270-second periodicity appears in Observation 7A residuals (SEN-81-017).
  • Recovered Signal 14 reports a period match to four significant figures (SEN-14-052).
  • Independent notes and recoveries recur on the same interval (SEN-21-070, SEN-24-096).
  • Convenient instrumental explanations tested in 1981 were excluded.

Unknown

  • Mechanism.
  • Whether the 1979 Tape Series M emission is the same phenomenon or a coincidence of numbers.
  • Why the residual does not reproduce on demand.

Open questions

  • Is Tape Series M the same phenomenon or a coincidence of numbers?
  • Why does the residual refuse routine reproduction?

Competing explanations

  1. Undiagnosed instrumental artefact common to northern emplacements.
  2. Genuine environmental / propagation structure at a stable period.
  3. Catalogue contamination — later readers projecting 1270 onto unrelated recoveries.
  4. None of the above; the correlation is real and still unexplained.

Evidence

  1. SEN-81-017
  2. SEN-86-044
  3. SEN-14-052
  4. SEN-21-070
  5. SEN-16-007
  6. SEN-24-096
  7. SEN-24-128

Counter-evidence / limits

  • No on-demand reproduction of the residual after 1981 campaigns.
  • Convenient instrumental explanations were tested and excluded — absence of those explanations is not positive proof of an external source.

Timeline

  1. 1981-09-04

    Observation 7A logged

    SEN-81-017

  2. 1986-08-29

    LOWFIELD commissioned (prior record outside station log)

    SEN-86-044

  3. 2014-11-19

    Recovered Signal 14 — period match noted

    SEN-14-052

  4. 2014-12-02

    Case opened at MERIDIAN

  5. 2016-03-22

    Experiment Delta holdover results filed

    SEN-16-007

  6. 2021-06-30

    Tape Series M recovery summary

    SEN-21-070

  7. 2024-09-17

    Convergent independent results note

    SEN-24-096

  8. 2024-10-03

    Period-1270 cross-index filed

    SEN-24-128

Disclosure history

  1. 2014-12-02 — Case opened; evidence list PUBLIC at summary level
  2. 2021-06-30 — Tape Series M recovery attached as evidence (SEN-21-070 RESTRICTED body)
  3. 2024-09-17 — Last public review; status remains UNRESOLVED
  4. 2024-10-03 — Cross-index SEN-24-128 filed OPEN
  5. [ Investigation remains open — further events possible ]

Current status / finding

You may establish that the correlation exists. You will not find, in the public catalogue, an established why. The case remains UNRESOLVED.

Uncertainty is retained on purpose. This finding is the current institutional position and remains subject to further evidence.

CASE-1270 Working figure

Common interval

Readers assembling CASE-1270 sometimes record a single interval that recurs across the evidence.

Objective Enter the common interval in seconds.

Clues

  • SEN-81-017 logs a residual period.
  • SEN-14-052 reports a match to four significant figures.
  • Independent notes converge on the same figure.
Hint

Count seconds, not minutes.

Second hint

The figure appears with a comma in some notes: 1,270.

Accessible path (no interaction required)

The recurring interval in SEN-81-017, SEN-14-052, and related notes is 1,270 seconds.

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