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The Search for Extraterrestrial Intelligence aims to find evidence oftechnosignatures, which can point toward the possible existence oftechnologically advanced extraterrestrial life. Radio signals similar to thoseengineered on Earth may be transmitted by other civilizations, motivatingtechnosignature searches across the entire radio spectrum. In this endeavor,the low-frequency radio band has remained largely unexplored; with prior radiosearches primarily above 1 GHz. In this survey at 110-190 MHz, observations of1,631,198 targets from TESS and Gaia are reported. Observations took placesimultaneously with two international stations (noninterferometric) of the LowFrequency Array in Ireland and Sweden. We can reject the presence of anyDoppler drifting narrowband transmissions in the barycentric frame ofreference, with equivalent isotropic radiated power of 10 17 W, for 0.4 million(or 1.3 million) stellar systems at 110 (or 190) MHz. This work demonstratesthe effectiveness of using multisite simultaneous observations for rejectinganthropogenic signals in the search for technosignatures.

A Simultaneous Dual-site Technosignature Search Using International LOFAR Stations