A Simultaneous Dual-site Technosignature Search Using International LOFAR Stations
arXiv:2310.15704 · doi:10.3847/1538-3881/acf9f5
Abstract
The Search for Extraterrestrial Intelligence aims to find evidence of technosignatures, which can point toward the possible existence of technologically advanced extraterrestrial life. Radio signals similar to those engineered on Earth may be transmitted by other civilizations, motivating technosignature searches across the entire radio spectrum. In this endeavor, the low-frequency radio band has remained largely unexplored; with prior radio searches primarily above 1 GHz. In this survey at 110-190 MHz, observations of 1,631,198 targets from TESS and Gaia are reported. Observations took place simultaneously with two international stations (noninterferometric) of the Low Frequency Array in Ireland and Sweden. We can reject the presence of any Doppler drifting narrowband transmissions in the barycentric frame of reference, 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 demonstrates the effectiveness of using multisite simultaneous observations for rejecting anthropogenic signals in the search for technosignatures.
15 Pages, 16 Figures, 2 Machine Readable Tables
References in corpus (8)
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- The Transiting Exoplanet Survey Satellite
- astroquery: An Astronomical Web-Querying Package in Python
- Abiotic oxygen-dominated atmospheres on terrestrial habitable zone planets
- Choosing a Maximum Drift Rate in a SETI Search: Astrophysical Considerations
- A deep-learning search for technosignatures of 820 nearby stars
- An Opportunistic Search for ExtraTerrestrial Intelligence (SETI) with the Murchison Widefield Array
- Drift Rates of Narrowband Signals in Long-term SETI Observations for Exoplanets