Fig. 18.
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Time series of X-shooter AT 2017gfo spectra as if observed with MAAT with the OSIRIS R1000B and R1000R grisms for 0.5 h exposure per epoch. The observed broad-band SDSS gri magnitudes are also shown with circular markers (Smartt et al. 2017; Pian et al. 2017). Note that AT 2017gfo was found in a nearby galaxy at 40 Mpc and with an almost polar inclination angle direction ∼20° (Hotokezaka et al. 2019).
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