Radio signal toward K2-155 remains unclassified, with interference more likely

ScienceAlert reports that astronomers used a new machine-learning pipeline to search observations from China’s FAST radio telescope for possible signs of extraterrestrial technology. One signal, NBS 260108, was concentrated in a narrow frequency band, drifted in frequency and appeared only in the beam aimed at K2-155—not the other 18 beams. But it was strongly detected in just one of two polarization channels, and similar signals appeared at nearby frequencies during observations of three other stars. The researchers’ paper says human-made or instrumental interference is more plausible than an extraterrestrial source. Its exact origin remains unresolved, and the team retains it only as a low-priority follow-up candidate, not a robust detection.