Presentation #315.04 in the session Cosmology.
The Experiment to Detect the Global EoR Signature (EDGES) aims to detect the global 21-cm feature from the period in the universe’s formation when the first stars and galaxies began to appear. Following the 2018 detection of a global absorption feature centered at ~ 78 MHz with a depth of ~ 500 mK, an improved iteration of this experiment (EDGES-3) was designed and fabricated at MIT’s Haystack Observatory. This system was commissioned and deployed on Devon Island in the Canadian Arctic in the summer of 2022, followed by a deployment to the outback of Western Australia in the fall of 2022, where it is currently producing new data daily. This presentation will give a brief overview of the deployments, including a discussion of the issues that arise from making such a sensitive measurement in hostile, remote environments while trying to avoid RFI and dealing with an active sun. Additionally some preliminary results from EDGES-3 will be presented along with plans for EDGES in the future.