Presentation #315.06 in the session Cosmology.
The redshifted 21 cm signature from neutral hydrogen present during the formation of the first stars, known as Cosmic Dawn, can place tight constraints on the astrophysical conditions present in the early Universe. A potential detection of the global signal, which is the signal averaged over large angles on the sky, was reported by the Experiment to Detect the Global EoR Signature (EDGES) collaboration. This reported signal has a spectral shape and amplitude which are not predicted by standard cosmological models. If validated, this would imply deficits in our understanding of the early Universe during Cosmic Dawn. The Long Wavelength Array offers the ability to validate this reported signal using different instrumentation and techniques. LWA-SV is an antenna array located on the Sevilleta National Wildlife Refuge in New Mexico, USA which can observe frequencies between 3 - 88 MHz and offers beamforming capabilities. I will discuss an ongoing effort to validate the EDGES signal using LWA-SV. We have developed custom beamforming capabilities for LWA-SV as well as observational and data analysis methodology for beamformed observations aiming to detect the global 21 cm signature. I will present current limits and discuss potential ways to improve our limiting systematics.