The Search for Extra-Galactic Intelligence Signal Synchronized with a Binary Neutron Star Merger

TL;DR

This paper explores the potential for detecting extraterrestrial signals synchronized with observed binary neutron star mergers, proposing a method for receiving such signals from distant galaxies using future radio telescopes.

Contribution

It introduces a novel concept of timing extraterrestrial signals with gravitational wave events, outlining how high-precision measurements enable detection of signals sent thousands of years prior.

Findings

Potential detection of ~10^4 bits from 40 Mpc distance

Signals could be transmitted ~10^4 years before the merger

Future GW detectors could enhance detection prospects

Abstract

We discuss the possibility of receiving a radio signal from extra-Galactic intelligence, around the time when we observe a binary neutron star merger in their galaxy. High-precision measurements of the binary parameters allow them to send the signal ~ $10^4$ years before they themselves observe the merger signal. Using the SKA, we might receive ~ $10^4$ bits of data, transmitted from 40 Mpc distance with the output power of ~ 1 TW. We also discuss related topics for GW170817 and mention potential roles of future gravitational wave detectors in relation to this transmission scheme.