A Search for Technosignatures toward the Galactic Centre at 150 MHz. (arXiv:2202.03324v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Tremblay_C/0/1/0/all/0/1">Chenoa D. Tremblay</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Price_D/0/1/0/all/0/1">Danny C. Price</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tingay_S/0/1/0/all/0/1">Steven J. Tingay</a>
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.
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.
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