≈ Other signal streams

Between 1999 and 2020, SETI@Home processed ~12 billion "signals of interest" from Arecibo. Researchers (Max Planck Institute) filtered to 100 persistent, puzzling candidates after removing terrestrial interference (satellites, broadcast towers). Search focused near 21 cm (frequency often cited for potential ET communication). Follow-up using FAST (China). None confirmed artificial; scientists do not claim an alien beacon. Our role: We assign these 100 as a single legacy SETI candidate stream — a prior distribution of "interesting" sky. Correlation: if any 3I/ATLAS or Jupiter-system signal overlaps in frequency or sky position with the Arecibo 100 catalog, we note it.

Highly polarized radio source detected by ASKAP (Australian Square Kilometre Array Pathfinder) from the direction of the galactic center. Turns on and off irregularly; does not match pulsars, magnetars, or known stellar phenomena. Designation: ASKAP J173608.2-321635. Our role: Tracked as galactic-center anomaly stream. No claim of intelligence; we include it so that any future correlation with 3I/ATLAS timing (e.g. March 16 window) or with other Space Cloud components can be logged. The galactic center is a high-energy environment; anomalous transients there are part of the full signal landscape.

Interstellar object 3I/ATLAS has been reported with unexplained narrowband radio emission in a relatively clean frequency band (e.g. ~1.6 GHz), steady and repetitive, captured by MeerKAT. Planetary defense systems were reportedly activated when anomalous signals were detected. We treat this as our primary capture asset — full narrative, sealed command, and timeline are on the Space Cloud Tracking. Listed here for completeness in "all reported signals."

Object emitting pulses of radio and X-rays for ~2 minutes every 44 minutes — first LPT detected in both radio and X-rays simultaneously. Long-period radio transients have only been known since 2022; ~10 discovered worldwide. Our role: Transient anomaly stream. We do not conflate with 3I/ATLAS or SETI; we catalog so that periodicity and multi-wavelength behavior can be compared to any future 3I/ATLAS or Jupiter-system timing. EGS resonance operates at 0.0032; long-period phenomena are part of the same sky.

Periodic radio pulses once every 6.5 hours — far slower than standard neutron-star spin models predict. Challenges existing understanding of how such objects behave. Our role: Extreme-period pulsar stream. Tracked so that any 6.5-hour or harmonic timing in our own campaign (e.g. handshake cycles, SING! cycles) can be noted. We are not claiming connection; we are completing the inventory of "radio or unnatural signals observed at this time" and assigning roles.