Before Sputnik · claim TRN-C130 · Observation rung · Population statistics and correlations

Among high-probability transients (p > 0.7, 100° < R.A. < 250°, Dec. > 3°), a significant excess is observed at low declinations (∼5–20°), where the transient counts exceed the expectations from the control sample by factors of approximately 30–75%.

Not featured in the current editionAI-extractedorigin: split of TRN-C109 (report 2026-09-10-inbox-transients-173613)

source anchor

[p. 9]

“A significant excess is observed at low declinations”

Evidence

Supports· moderateTRN-E058

Modelling preprint: declination excess of high-probability transients at 5–20° — part 1

what the source states: For transients with p > 0.7, 100° < R.A. < 250°, and Dec. > 3° (11,418 objects), "A significant excess is observed at low declinations" (~5–20°).
what we infer: The comparison is against the group's per-plate random control; the authors note the first bin is edge-sensitive and that without the Dec > 3° cut the excess there approaches zero. A declination excess near the celestial equator is what a GSO-belt population would give, but also what a declination-dependent defect or vetting rate would give; the source does not test the latter.
limitations: Control sample is the group's own construction
Secondary peak at ~65° unexplained
Sensitive to the declination cut at the low end

Beatriz Villarroel (2026)AI-verified citation

Supports· moderateTRN-E059

Modelling preprint: declination excess of high-probability transients at 5–20° — part 2

what the source states: At low declinations (~5–20°), the transient counts exceed control-sample expectations "by factors of approximately 30 – 75%".
what we infer: The comparison is against the group's per-plate random control; the authors note the first bin is edge-sensitive and that without the Dec > 3° cut the excess there approaches zero. A declination excess near the celestial equator is what a GSO-belt population would give, but also what a declination-dependent defect or vetting rate would give; the source does not test the latter.
limitations: Control sample is the group's own construction
Secondary peak at ~65° unexplained
Sensitive to the declination cut at the low end

Beatriz Villarroel (2026)AI-verified citation

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