http://arxiv.org/abs/2201.10078
The radiation of a Fast Radio Burst (FRB) reflects from the Moon and Sun. If a reflection is detected, the time interval between the direct and reflected signals constrains the source to a narrow arc on the sky. If both Lunar and Solar reflections are detected these two arcs intersect, narrowly confining the source location on the sky. Galactic FRB like FRB 200428 may be bright enough to be detected by a 25 m diameter radio telescope staring at the Moon or Sun. A previous paper calculated reflection by the Moon. Here we calculate the reflectivity of the Sun in the “flat Sun” approximation as a function of angle of incidence and frequency. At grazing incidence the reflectivity is high at frequencies $\lessapprox 200\,$MHz but low at higher frequencies; for near-normal incidence the reflectivity is high only for frequencies $\lessapprox 100\,$MHz.
S. Wang and J. Katz
Wed, 26 Jan 22
30/53
Comments: 3 pp, 2 figures
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