Table 2.
Log of spectroscopic observations.
| MJD | Phase | Telescope/Instrument | Disperser | Slit | Wavelength | Spectral | Exposure |
|---|---|---|---|---|---|---|---|
| (day) | width (″) | range (Å) | resolution | time (s) | |||
| 58453.349 | –1.4 | Keck-I/LRIS | 400/3400 + 400/8500 | 1.0 | 3076–9350 | 600/1200 | 300/300 |
| 58461.248 | 5.4 | P60/SEDm | ... | IFU | 4650–9200 | 100 | 2250 |
| 58464.228 | 7.9 | P60/SEDm | ... | IFU | 3950–9200 | 100 | 2250 |
| 58465.246 | 8.8 | P200/DBSP | 600/316 | 1.5 | 3500–10 000 | 1000/1000 | 1200 |
| 58467.254 | 10.5 | NTT/EFOSC2 | Gr#13 | 1.0 | 3650–9250 | 350 | 3600 |
| 58480.217 | 21.6 | P60/SEDm | ... | IFU | 5500–8850 | 100 | 1200 |
| 58483.292 | 24.3 | Lick/Kast | 600/4310 + 300/7500 | 2.0 | 3500–10 500 | 800 | 1960 |
| 58487.225 | 27.6 | Lick/Kast | 600/4310 + 300/7500 | 2.0 | 3500–10 500 | 800 | 2400 |
| 58490.934 | 30.8 | NOT/ALFOSC | Gr#4 | 1.3 | 3600–9600 | 280 | 1800 |
| 58491.226 | 31.1 | NTT/EFOSC2 | Gr#11 + Gr#16/OG530 | 1.0 | 3345–9995 | 460/460 | 1800/1800 |
| 58493.096 | 32.7 | VLT/X-shooter | ... | 1.0/0.9/0.9 | 3000–24 800 | 5400/8900/5600 | 1800 |
| 58509.904 | 47.1 | NOT/ALFOSC | Gr#4 + WG345 | 1.3 | 3800–9450 | 280 | 600 |
| 58510.179 | 47.3 | Lick/Kast | 600/4310 + 300/7500 | 2.0 | 3500–10 500 | 800 | 3600 |
| 58515.100 | 51.5 | NTT/EFOSC2 | Gr#11 + Gr#16/OG530 | 1.0/1.0 | 3345–9995 | 460/460 | 1800/1800 |
| 58525.048 | 60.1 | VLT/X-shooter | ... | 1.0/0.9/0.9 | 3000–24 800 | 5400/8900/5600 | 2400 |
| 58536.929 | 70.3 | NOT/ALFOSC | Gr#4 | 1.3 | 3900–9600 | 280 | 2400 |
| 58541.083 | 73.8 | NTT/EFOSC2 | Gr#11 + Gr#16/OG530 | 1.0/1.0 | 3345–9995 | 460/460 | 2200/2200 |
| 58550.037 | 81.5 | VLT/X-shooter | ... | 1.0/0.9/0.9 | 3000–24 800 | 5400/8900/5600 | 3600 |
| 58559.153 | 89.3 | Lick/Kast | 600/4310 + 300/7500 | 2.0 | 3500–10 500 | 800 | 2400 |
| 58565.000 | 94.3 | VLT/X-shooter | ... | 1.0/0.9/0.9 | 3000–24 800 | 5400/8900/5600 | 3600 |
| 58718.304 | 225.8 | NTT/EFOSC2 | Gr#13 | 1.0 | 3650–9250 | 350 | 5400 |
| 58724.585 | 231.2 | Keck-I/LRIS | 400/3400 + 400/8500 | 1.0 | 3076–9350 | 600/1200 | 300/300 |
| 58776.290 | 275.6 | NTT/EFOSC2 | Gr#13 | 1.5 | 3650–9250 | 230 | 5400 |
| 58776.907 | 276.1 | LBT/MODS+LUCI (a) | G400L/G670L/G200 | 1.2/1.2/1.0 | 3200–12 000 | 925/1150/1100 | 3049/3083/3800 |
| 58789.287 | 286.7 | VLT/X-shooter (b) | ... | 1.0/1.0/0.9 | 3000–20 700 | 5400/8900/5600 | 3600 |
| 58866.134 | 352.6 | VLT/X-shooter (b) | ... | 1.0/1.0/0.9 | 3000–20 700 | 5400/8900/5600 | 3600 |
| 58876.648 | 361.6 | LBT/MODS+LUCI (a) | G400L/G670L/G200/G200 | 1.2/1.2/1.0/1.0 | 3200–23 500 | 925/1150/1100/1100 | 7200/7200/3400/2800 |
| 58895.120 | 377.5 | VLT/X-shooter (b) | ... | 1.0/1.0/0.9 | 3000–20 700 | 5400/8900/5600 | 3600 |
| 59110.570 | 562.3 | Keck-I/LRIS | 600/4000 + 400/8500 | 1.0 | 3400–10 275 | 1000/1200 | 4935/4935 |
| 59113.780 | 565.0 | VLT/FORS2 | 300V | 1.0 | 3800–9600 | 440 | 6600 |
| 59198.044 | 637.3 | VLT/FORS2 | 300V | 1.0 | 3800–9600 | 440 | 14 400 |
| 59607.089 | 988.1 | Gemini-S/GMOS | R150/GG455 | 1.0 | 5000–10 000 | 310 | 4800 |
| 59608.380 | 989.2 | VLT/FORS2 | 300V | 1.0 | 3800–9600 | 440 | 14 400 |
Notes. The modified Julian dates quote the beginning of each spectroscopic observation. The phase is reported for the mid-exposure time in the rest-frame with respect to the g|r-band maximum at MJD = 58455. For the multi-arm instruments Kast, LBT, LRIS and X-shooter, we report the exposure time and spectral resolution of each arm. The wavelength ranges and the values of the spectral resolutions are taken from instrument manuals and are reported in the observer frame. The spectral resolutions refer to the unbinned data.
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