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Table 1

Log of observations.

Date Grism Resolution Exptime Airmass
(s)

11/09/2016 1000R 450 2 × 500 1.34–1.37
26/09/2016 1000B 500 3 × 1000 1.22–1.33
09/10/2016 2500U 1250 4 × 1800 1.11–1.08
19/01/2017 2500R 1850 3 × 720 1.32–1.43

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