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Spitzer mid-infrared detections of neutron star merger GW170817 suggests synthesis of the heaviest elements
We report our Spitzer Space Telescope observations and detections of the binary neutron star merger GW170817. At 4.5um, GW170817 is detected at 21.9 mag AB at +43 days and 23.9 mag AB at +74 days after merger. At 3.6um, GW170817 is not detected to a limit of 23.2 mag AB …