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Table A.3.

Record of the archival WFC3 images used to identify the progenitor.

Date MJD Phase Instrument Filter Exposure time Vega mag.
(+2400000) (d) (s)
2015 Dec 07 57363.06 −845 WFC3/UVIS F350LP 1050 25.67 (0.06)
2015 Dec 07 57363.08 −845 WFC3/IR F160W 1106 21.79 (0.02)
2015 Dec 14 57370.68 −837 WFC3/UVIS F350LP 1050 25.69 (0.04)
2015 Dec 14 57370.70 −837 WFC3/UVIS F555W 1100 26.61 (0.11)
2015 Dec 21 57377.92 −830 WFC3/UVIS F814W 1100 23.77 (0.04)
2015 Dec 28 57384.74 −823 WFC3/IR F160W 1106 21.89 (0.02)
2016 Jan 03 57390.02 −818 WFC3/UVIS F350LP 1050 25.83 (0.05)
2016 Jan 03 57390.04 −818 WFC3/UVIS F555W 1100 26.77 (0.12)
2016 Jan 05 57392.77 −815 WFC3/UVIS F350LP 1050 25.69 (0.04)
2016 Jan 12 57399.14 −809 WFC3/UVIS F814W 1100 24.10 (0.05)
2016 Feb 05 57423.56 −784 WFC3/UVIS F350LP 1050 25.81 (0.04)
2016 Feb 11 57429.54 −778 WFC3/UVIS F814W 1100 24.07 (0.04)
2016 Feb 18 57436.89 −771 WFC3/UVIS F350LP 1050 25.76 (0.04)
2018 Apr 23a 58232.17 +24 WFC3/UVIS F555W 270 15.79 (0.01)

Notes.

(a)

This image contains the SN (see proposal 15151).

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