The signal of interest

Breakthrough Listen observations contained a narrowband signal with some characteristics expected of a possible technosignature. The candidate was therefore investigated rather than immediately declared extraterrestrial.

[1] Sheikh et al. / Nature Astronomy

What the analysis found

Sheikh and colleagues identified electronically drifting intermodulation from local interferers and related signals at frequencies associated with common clock oscillators. Their conclusion refutes an extraterrestrial interpretation of this candidate within the scope of their analysis, not the wider search for intelligence.

[1] Sheikh et al. / Nature Astronomy

Source chronology

Dates below describe source publication, which may differ from the date of an observation or event.

2021-11-11

Analysis of blc1 with a technosignature verification framework

Sheikh et al. / Nature Astronomy · Original record

Connected knowledge

seti

RELATED TO · Breakthrough Listen analyzed the candidate with a verification framework.

Established
technosignatures

TESTS INTERPRETATION · The candidate’s extraterrestrial interpretation was rejected in the cited analysis.

Refuted within scope
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Source trail

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