Image Details
Caption: Figure 2.
Skymap at the time of GRB 180720B for Fermi, Earth is the large circle at the middle of the figure with the geocenter indicated by the star. The intensity map shows the scattering locations on Earth of 100% polarized (PA = 0°) photon beam. Gray circles indicate the pointing locations of the Fermi-GBM detectors. The location of GRB 180720B is indicated by a red circle.
© 2026. The Author(s). Published by the American Astronomical Society.