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Table 3.

Late-time optical spectroscopy of iPTF14hls.

Date (UT) JD-2457000 Phasea Telescope Instrument FWHM Range
(days) (days) (Å) (Å)
2016-09-28 660.13 +712.59 Keck I LRIS 6 3162–10 274
2016-09-30 661.73 +714.13 NOT ALFOSC 17 3629–9713
2016-10-08 670.09 +722.22 FTN FLOYDS 16 3301–9301
2016-10-14 676.08 +728.01 FTN FLOYDS 16 4800–9300
2016-10-25 687.10 +738.66 Keck II DEIMOS 3 4440–9638
2016-10-25 687.15 +738.71 Keck II DEIMOS 3 4771–7428
2016-11-08 701.11 +752.20 FTN FLOYDS 16 3999–9300
2016-11-24b 717.12 +767.68 FTN FLOYDS 16 4800–10 000
2016-11-29 721.71 +772.12 NOT ALFOSC 17 3833–9710
2016-12-13b 736.06 +785.99 FTN FLOYDS 16 5000–9300
2017-02-28 813.47 +860.83 NOT ALFOSC 17 3334–9715
2017-03-26 838.52 +885.04 NOT ALFOSC 17 3537–9710
2017-04-04 848.41 +894.61 TNG DOLORES 14 3282–10 462
2017-04-24 867.50 +913.06 TNG DOLORES 14 3401–8566
2017-05-26 900.42 +944.89 NOT ALFOSC 17 3464–9708
2017-05-30 903.78 +948.14 Keck I LRIS 6 3150–10 237
2017-10-14 1041.12 +1080.91 Keck II DEIMOS 3 4450–9634
2017-10-26 1052.70 +1092.10 NOT ALFOSC 17 3817–9636
2017-11-13 1071.04 +1109.83 Keck II DEIMOS 3 4320–9904
2017-11-18 1076.05 +1114.67 Keck I LRIS 6 3138–10 233
2017-12-02 1089.62 +1127.79 NOT ALFOSC 17 3432–9714
2017-12-29 1116.57 +1153.85 NOT ALFOSC 17 3780–9720
2018-01-14 1132.93 +1169.66 Keck I LRIS 6 3069–10 266

Notes.

(a)

Rest-frame days from discovery.

(b)

Not shown in Fig. 6.

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