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Following the results of our previous low frequency searches forextraterrestrial intelligence (SETI) using the Murchison Widefield Array (MWA),directed toward the Galactic Centre and the Orion Molecular Cloud (GalacticAnticentre), we report a new large-scale survey toward the Vela region with thelowest upper limits thus far obtained with the MWA. Using the MWA in thefrequency range 98-128 MHz over a 17 hour period, a $\sim$400 deg$^2$ fieldcentred on the Vela Supernova Remnant was observed with a frequency resolutionof 10 kHz. Within this field there are six known exoplanets. At the positionsof these exoplanets, we searched for narrow band signals consistent with radiotransmissions from intelligent civilizations. No unknown signals were foundwith a 5sigma detection threshold. In total, across this work plus our twoprevious surveys, we have now examined 75 known exoplanets at low frequencies.In addition to the known exoplanets, we have included in our analysis thecalculation of the Effective Isotropic Radiated Power (EIRP) upper limitstoward over 10 million stellar sources in the Vela field with known distancesfrom Gaia (assuming a 10 kHz transmission bandwidth).

A SETI Survey of the Vela Region using the Murchison Widefield Array: Orders of Magnitude Expansion in Search Space