Following from the results of the first systematic modern low frequency Search for Extraterrestrial Intelligence ( SETI ) using the Murchison Widefield Array ( MWA ) , which was directed toward a Galactic Center field , we report a second survey toward a Galactic Anticenter field .
Using the MWA in the frequency range of 99 to 122 MHz over a three hour period , a 625 sq .
deg .
field centered on Orion KL ( in the general direction of the Galactic Anticenter ) was observed with a frequency resolution of 10 kHz .
Within this field , 22 exoplanets are known .
At the positions of these exoplanets , we searched for narrow band signals consistent with radio transmissions from intelligent civilisations .
No such signals were found with a 5 \sigma detection threshold .
Our sample is significantly different to the 45 exoplanets previously studied with the MWA toward the Galactic Center ( 11 ) , since the Galactic Center sample is dominated by exoplanets detected using microlensing , hence at much larger distances compared to the exoplants toward the Anticenter , found via radial velocity and transit detection methods .
Our average effective sensitivity to extraterrestrial transmiter power is therefore much improved for the Anticenter sample .
Added to this , our data processing techniques have improved , reducing our observational errors , leading to our best detection limit being reduced by approximately a factor of four compared to our previously published results .