Speaker
Prof.
Raul Monsalve
(Department of Physics and McGill Space Institute McGill University)
Description
I will present results from observations with the EDGES Mid-Band system. This instrument measured in 2018 the sky-averaged radio spectrum in the range ~60-120 MHz. It used a blade antenna that is ~30% smaller than the Low-Band antennas used for the measurements in Bowman et al. (2018). Despite the smaller antenna, in the Mid-Band spectrum we identify an absorption feature that is consistent with our Low-Band result. This consistency increases the confidence that this feature is not an instrumental artifact but instead a spectral property of the sky. In my talk I will describe the Mid-Band observations, instrument calibration, data modelling, and characteristics of the Mid-Band absorption signal.
