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Table A.1

Log of optical and NIR observations.

MJD Epoch Instrument Filter Exposure Brightness
(days) (s) time (s) (magAB)

56 039.308 664.2 Swift/UVOT uvw2 38.9 > 20.27
56 039.313 1110.2 Swift/UVOT uvw2 38.9
56 039.373 6244.8 Swift/UVOT uvw2 332.2
56 066.505 2 350 484 Swift/UVOT uvw2 16 823.3 > 24.05
56 039.311 935.9 Swift/UVOT uvm2 77.8
56 039.370 5967.3 Swift/UVOT uvm2 196.6
56 039.436 11 694.8 Swift/UVOT uvm2 885.6
56 066.471 2 347 530 Swift/UVOT uvm2 16 365 > 23.73
56 039.311 912.7 Swift/UVOT uvw1 58.3 > 20.56
56 039.364 5454.6 Swift/UVOT uvw1 393.2
56 039.445 12 479.4 Swift/UVOT uvw1 645.3
56 039.598 25 671.6 Swift/UVOT uvw1 1771.2
56 067.110 2 402 743 Swift/UVOT uvw1 11 529.3 > 23.43
56 039.305 387.2 Swift/UVOT u 245.8
56 039.311 898.9 Swift/UVOT u 52.9 > 20.08
56 039.366 5659.9 Swift/UVOT u 393.2
56 039.530 19 853.4 Swift/UVOT u 1770.3
56 039.645 29 800.8 Swift/UVOT u 651.6
56 042.104 242 229.9 Swift/UVOT u 11 277.9 > 22.94
56 051.997 1 096 947 Swift/UVOT u 69 897.4
56 077.011 3 258 148 Swift/UVOT u 27 766.2 > 23.32
56 039.339 3328.3 Swift/UVOT b 451.6 > 20.93
56 039.539 20 641.6 Swift/UVOT b 1523.7
56 040.652 116 790.9 Swift/UVOT b 1444 > 21.58
56 061.463 1 914 851 Swift/UVOT b 7250.3
56 093.296 4 665 241 Swift/UVOT b 449.7 > 20.33
56 039.302 90.4 Swift/UVOT v 9 > 17.52
56 039.311 912 Swift/UVOT v 77.7 > 18.83
56 039.541 20 785.9 Swift/UVOT v 1607.4 > 20.28
56 041.111 156 431 Swift/UVOT v 1282.9 > 20.27
56 093.300 4 665 526 Swift/UVOT v 449.8 > 19.17
56 039.990 59 563 GROND g 4 × 115 22.21 ± 0.10
56 040.015 61 702 GROND g 4 × 369 22.12 ± 0.05
56 040.036 63 556 GROND g 4 × 369 22.15 ± 0.07
56 040.040 63 883 Gemini/GMOS g 1 × 60 22.22 ± 0.06
56 040.057 65 383 GROND g 4 × 369 22.11 ± 0.08
56 040.089 68 118 GROND g 8 × 369 22.18 ± 0.06
56 040.173 75 361 P60 g 900 22.14 ± 0.10
56 041.067 152 661 GROND g 16 × 115 22.59 ± 0.10
56 041.104 155 811 GROND g 16 × 115 22.79 ± 0.16
56 043.239 340 286 Gemini/GMOS g 1 × 100 22.86 ± 0.06
56 048.018 753 173 GROND g 8 × 369 22.38 ± 0.10
56 050.011 925 358 GROND g 8 × 369 22.35 ± 0.08
56 053.969 1 267 371 GTC/OSIRIS g 1 × 100 22.14 ± 0.11
56 054.249 1 291 574 Gemini/GMOS g 1 × 30 22.16 ± 0.07
56 059.005 1 702 443 GROND g 8 × 369 22.22 ± 0.04
56 059.020 1 703 734 Gemini/GMOS g 1 × 120 22.19 ± 0.07
56 067.938 2 474 262 GROND g 4 × 369 22.82 ± 0.05
56 078.217 3 362 396 GROND g 24 × 115 23.29 ± 0.20
56 039.414 9793 Gemini/GMOS r 1 × 60 21.11 ± 0.04
56 039.990 59 563 GROND r 4 × 115 22.19 ± 0.14
56 040.015 61 702 GROND r 4 × 369 22.17 ± 0.07
56 040.036 63 556 GROND r 4 × 369 22.02 ± 0.05
56 040.047 64 459 Gemini/GMOS r 1 × 60 22.10 ± 0.05
56 040.057 65 383 GROND r 4 × 369 22.22 ± 0.07
56 040.089 68 118 GROND r 8 × 369 22.12 ± 0.08
56 040.161 74 357 P60 r 900 22.28 ± 0.10
56 040.888 137 134 NOT/MOSCA r 4 × 300 22.28 ± 0.08
56 041.068 152 661 GROND r 16 × 115 22.34 ± 0.09
56 041.104 155 811 GROND r 16 × 115 22.47 ± 0.12
56 041.949 228 856 NOT/MOSCA r 12 × 300 22.23 ± 0.06
56 042.938 314 237 NOT/ALFOSC r 24 × 150 22.07 ± 0.06
56 043.247 340 990 Gemini/GMOS r 1 × 100 22.12 ± 0.06
56 048.018 753 173 GROND r 8 × 369 21.48 ± 0.05
56 048.967 835 203 NOT/StanCAM R 8 × 150 21.45 ± 0.10
56 050.011 925 358 GROND r 8 × 369 21.33 ± 0.04
56 052.958 1 179 975 Gemini/GMOS r 1 × 30 21.41 ± 0.10
56 053.886 1 260 196 NOT/StanCAM R 12 × 150 21.25 ± 0.06
56 053.972 1 267 581 GTC/OSIRIS r 1 × 100 21.37 ± 0.14
56 054.258 1 292 332 Gemini/GMOS r 1 × 30 21.26 ± 0.05
56 056.895 1 520 199 NOT/ALFOSC r 8 × 150 21.23 ± 0.07
56 059.032 1 704 797 Gemini/GMOS r 1 × 120 21.27 ± 0.05
56 059.005 1 702 443 GROND r 8 × 369 21.21 ± 0.04
56 061.962 1 957 915 Gemini/GMOS r 1 × 30 21.32 ± 0.06
56 063.912 2 126 451 NOT/ALFOSC r 15 × 90 21.36 ± 0.08
56 065.897 2 297 894 NOT/MOSCA r 16 × 90 21.48 ± 0.05
56 065.968 2 304 100 Gemini/GMOS r 1 × 100 21.51 ± 0.04
56 066.028 2 309 230 Magellan/LDSS3 r 3 × 180 21.55 ± 0.04
56 067.938 2 474 262 GROND r 4 × 369 21.65 ± 0.04
56 067.957 2 475 887 NOT/MOSCA r 15 × 90 21.54 ± 0.08
56 067.979 2 477 779 DuPont/CCD r 4 × 500 21.58 ± 0.05
56 069.966 2 649 489 Gemini/GMOS r 1 × 100 21.73 ± 0.04
56 069.902 2 643 961 NOT/MOSCA r 15 × 90 21.79 ± 0.07
56 070.957 2 735 091 Gemini/GMOS r 1 × 100 21.77 ± 0.08
56 071.907 2 817 199 NOT/ALFOSC r 10 × 90 21.96 ± 0.07
56 078.217 3 362 396 GROND r 24 × 115 22.43 ± 0.11
56 079.955 3 512 502 Gemini/GMOS r 1 × 30 22.41 ± 0.11
56 083.915 3 854 715 NOT/ALFOSC r 20 × 90 22.39 ± 0.47
56 039.322 1880 Gemini/GMOS i 1 × 240 20.93 ± 0.04
56 039.896 51 451 NOT/MOSCA I 12 × 300 22.19 ± 0.08
56 039.990 59 563 GROND i 4 × 115 22.01 ± 0.18
56 040.015 61 702 GROND i 4 × 369 22.13 ± 0.07
56 040.036 63 556 GROND i 4 × 369 22.27 ± 0.10
56 040.047 64 459 Gemini/GMOS i 1 × 60 22.16 ± 0.06
56 040.078 67 209 GROND i 12 × 369 22.32 ± 0.09
56 040.149 73 289 P60 i 900 22.23 ± 0.17
56 040.871 135 683 NOT/MOSCA i 4 × 300 22.48 ± 0.12
56 041.067 152 661 GROND i 16 × 115 22.50 ± 0.16
56 041.104 155 811 GROND i 16 × 115 22.59 ± 0.19
56 041.924 226 705 NOT/MOSCA i 6 × 300 22.37 ± 0.13
56 042.866 308 045 GTC/OSIRIS i 1 × 10 22.33 ± 0.14
56 042.885 309 735 NOT/ALFOSC i 13 × 300 22.35 ± 0.06
56 043.255 341 689 Gemini/GMOS i 1 × 100 22.29 ± 0.06
56 043.874 395 133 NOT/ALFOSC i 12 × 150 22.18 ± 0.08
56 047.890 742 159 NOT/ALFOSC i 3150 a 21.56 ± 0.08
56 048.018 753 173 GROND i 8 × 369 21.56 ± 0.08
56 048.987 836 905 NOT/StanCam i i 8 × 150 21.52 ± 0.08
56 050.011 925 358 GROND i 8 × 369 21.49 ± 0.05
56 053.916 1 262 736 NOT/StanCAM i i 12 × 150 21.34 ± 0.05
56 053.903 1 261 613 GTC/OSIRIS i 1 × 100 21.20 ± 0.09
56 063.974 1 267 805 GTC/OSIRIS i 1 × 100 21.27 ± 0.06
56 054.163 1 284 132 P60 i 1800 21.21 ± 0.14
56 054.264 1 292 809 Gemini/GMOS i 1 × 30 21.29 ± 0.05
56 055.175 1 371 560 P60 i 3600 21.26 ± 0.11
56 055.884 1 432 840 NOT/StanCAM i i 8 × 150 21.35 ± 0.05
56 058.889 1 692 472 NOT/ALFOSC i 11 × 150 21.32 ± 0.07
56 059.005 1 702 443 GROND i 8 × 369 21.27 ± 0.03
56 059.005 1 702 494 Gemini/GMOS i 1 × 120 21.24 ± 0.04
56 061.176 1 890 072 P60 i 3240 21.22 ± 0.14
56 062.181 1 976 858 P60 i 3600 21.27 ± 0.15
56 062.886 2 037 796 NOT/ALFOSC i 15 × 90 21.46 ± 0.22
56 063.180 2 063 213 P60 i 3600 21.33 ± 0.10
56 063.891 2 124 602 NOT/ALFOSC i 10 × 120 21.41 ± 0.17
56 065.921 2 300 003 NOT/MOSCA i 10 × 120 21.29 ± 0.05
56 066.040 2 310 267 Magellan/LDSS3 i 3 × 180 21.33 ± 0.04
56 067.934 2 473 900 NOT/MOSCA i 10 × 120 21.35 ± 0.05
56 067.938 2 474 262 GROND i 4 × 369 21.47 ± 0.06
56 068.014 2 480 838 DuPont/CCD i 4 × 500 21.41 ± 0.04
56 068.923 2 559 358 NOT/MOSCA i 19 × 60 21.39 ± 0.06
56 069.1911 2 582 542 P60 i 720 21.50 ± 0.09
56 070.0313 2 655 131 Magellan/LDSS3 i 3 × 300 21.40 ± 0.06
56 070.1766 2 667 689 P60 i 2340 21.59 ± 0.15
56 070.9694 2 736 187 Gemini/GMOS i 1 × 120 21.62 ± 0.04
56 071.8946 2 816 120 NOT/ALFOSC i 13 × 90 21.63 ± 0.08
56 076.8994 3 248 536 NOT/ALFOSC i 20 × 90 21.98 ± 0.09
56 078.2172 3 362 396 GROND i 24 × 115 22.06 ± 0.12
56 079.8939 3 507 261 NOT/ALFOSC i 30 × 90 22.08 ± 0.11
56 083.8841 3 852 020 NOT/ALFOSC i 20 × 90 22.15 ± 0.21
56 039.9900 59 563 GROND z 4 × 115 22.01 ± 0.20
56 040.0360 63 541 GROND z 12 × 369 22.09 ± 0.11
56 040.0599 65 605 Gemini/GMOS z 1 × 60 22.16 ± 0.11
56 040.0890 68 118 GROND z 8 × 369 22.37 ± 0.17
56 041.0675 152 661 GROND z 8 × 369 22.17 ± 0.16
56 041.1039 155 811 GROND z 8 × 369 22.28 ± 0.27
56 043.2633 342 383 Gemini/GMOS z 1 × 100 22.59 ± 0.07
56 048.0179 753 173 GROND z 8 × 369 21.86 ± 0.15
56 049.8781 913 895 CAHA/Omega2000 z 20 × 90 21.93 ± 0.08
56 050.0107 925 358 GROND z 8 × 369 21.78 ± 0.12
56 052.2596 1 119 664 UKIRT/WFCAM z 4 × 360 21.44 ± 0.13
56 053.9770 1 268 047 GTC/OSIRIS z 3 × 70 21.58 ± 0.07
56 054.2708 1 293 429 Gemini/GMOS z 1 × 30 21.63 ± 0.06
56 058.9733 1 699 722 Gemini/GMOS z 1 × 120 21.48 ± 0.04
56 059.0048 1 702 443 GROND z 8 × 369 21.48 ± 0.07
56 067.9101 2 471 861 NOT/MOSCA z 12 × 120 21.74 ± 0.15
56 067.9379 2 474 262 GROND z 4 × 369 21.62 ± 0.07
56 068.8970 2 557 129 NOT/MOSCA z 13 × 120 21.59 ± 0.12
56 070.9776 2 736 894 Gemini/GMOS z 1 × 120 21.86 ± 0.06
56 078.2172 3 362 396 GROND z 24 × 115 21.81 ± 0.12
56 049.9204 917 552 CAHA/Omega2000 Y 20 × 90 21.93 ± 0.17
56 039.3537 4589 UKIRT/WFCAM J 360 20.20 ± 0.06
56 039.3590 5048 UKIRT/WFCAM J 360 20.33 ± 0.07
56 039.3644 5514 UKIRT/WFCAM J 360 20.36 ± 0.07
56 039.3698 5979 UKIRT/WFCAM J 360 20.41 ± 0.07
56 048.9026 829 616 CAHA/Omega2000 J 60 × 60 21.60 ± 0.17
56 049.9727 922 069 CAHA/Omega2000 J 30 × 60 21.83 ± 0.20
56 052.2354 1 117 569 UKIRT/WFCAM J 4 × 360 21.75 ± 0.24
56 054.2834 1 294 514 Gemini-N/NIRI J 1 × 60 21.96 ± 0.11
56 065.2816 2 244 761 UKIRT/WFCAM J 6 × 360 21.90 ± 0.15
56 049.1898 854 426 P200/WIRC J 15 × 240 21.68 ± 0.16
56 039.3757 6493 UKIRT/WFCAM H 360 20.29 ± 0.09
56 039.3812 6963 UKIRT/WFCAM H 360 20.32 ± 0.09
56 039.3866 7432 UKIRT/WFCAM H 360 20.51 ± 0.11
56 039.3919 7894 UKIRT/WFCAM H 360 20.34 ± 0.10
56 040.3685 92 266 UKIRT/WFCAM H 4 × 360 21.65 ± 0.42
56 042.3348 262 155 UKIRT/WFCAM H 4 × 360 22.29 ± 0.31
56 054.2376 1 290 555 Gemini-N/NIRI K 1 × 60 21.46 ± 0.14

Notes. Magnitudes are corrected for Galactic extinction (E(BV) = 0.03 mag). Column “Epoch” shows the logarithmic mean-time after the GRB in the observer frame. We only display the total observing time of the Swift/UVOT and P60 data (see Sect. 2.2 for details). As described in Sect. 2.3, photometry was tied to the SDSS DR8 standard (griz) and to the 2MASS standard (JHKs). For those filters not covered by our primary calibration systems (RICiY), we used the instrument-specific band passes to transform magnitudes into the respective filter system.

(a)

The image is a stack of images with different exposure times. The shown time is the sum of the single images.

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