This paper is the fourth in a series of low-frequency searches for technosignatures. Using the Murchison Widefield Array over two nights we integrate 7 hours of data toward the Galactic Centre (centred on the position of Sagittarius A*) with a total field-of-view of 200 deg^2. We present a targeted search toward 144 exoplanetary systems, at our best yet angular resolution (75 arc seconds). This is the first technosignature search at a frequency of 155 MHz toward the Galactic Centre (our previous central frequencies have been lower). A blind search toward in excess of 3 million stars toward the Galactic Centre and Galactic bulge is also completed, placing an equivalent isotropic power limit <1.1X10^19W at the distance to the Galactic Centre. No plausible technosignatures are detected.
@article{arxiv.2202.03324,
title = {A Search for Technosignatures toward the Galactic Centre at 150 MHz},
author = {Chenoa D. Tremblay and Danny C. Price and Steven J. Tingay},
journal= {arXiv preprint arXiv:2202.03324},
year = {2022}
}
Comments
13 pages, 6 figures, accepted for publication in PASA