Authors: Raul A. Monsalve, Alan E. E. Rogers, Judd D. Bowman, Thomas J. Mozdzen
´¡²ú²õ³Ù°ù²¹³¦³Ù:ÌıWe report constraints on the global 21 cm signal due to neutral hydrogen at redshifts 14.8≥ z ≥6.5. We derive our constraints from low foreground observations of the average sky brightness spectrum conducted with the EDGES High-Band instrument between September 7 and October 26, 2015. Observations were calibrated by accounting for the effects of antenna beam chromaticity, antenna and ground losses, signal reflections, and receiver parameters. We evaluate the consistency between the spectrum and phenomenological models for the global 21 cm signal.
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