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Table 3
Observation log.
| Date | Δt | texp | Magnitude | Flux density | Ref. | Seeing |
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| (days) | (min) | (μJy) | (′′) | |||
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| 2013 May 3 | 6.722 | 1.0 | 20.93 ± 0.02 | 19.4 ± 0.4 | VLT-B | 0.96 |
| 2013 May 6 | 9.723 | 1.0 | 21.37 ± 0.04 | 12.9 ± 0.5 | VLT-B | 1.18 |
| 2013 May 8 | 11.645 | 1.0 | 21.40 ± 0.04 | 12.5 ± 0.5 | VLT-B | 0.77 |
| 2013 May 10 | 13.648 | 1.0 | 21.58 ± 0.06 | 10.7 ± 0.6 | VLT-B | 1.20 |
| 2013 May 11 | 14.648 | 1.0 | 21.63 ± 0.12 | 10.2 ± 1.1 | VLT-B | 1.57 |
| 2013 May 13 | 16.644 | 1.5 | 21.74 ± 0.06 | 9.3 ± 0.5 | VLT-B | 1.49 |
| 2013 May 14 | 17.748 | 1.5 | 21.68 ± 0.04 | 9.7 ± 0.4 | VLT-B | 0.80 |
| 2013 May 15 | 18.720 | 1.5 | 21.75 ± 0.08 | 9.2 ± 0.7 | VLT-B | 1.34 |
| 2013 May 19 | 22.597 | 2.5 | 21.68 ± 0.08 | 9.7 ± 0.7 | TNG-g′ | 1.25 |
| 2013 May 20 | 23.674 | 3.0 | 21.82 ± 0.22 | 8.6 ± 1.8 | VLT-B | 1.00 |
| 2013 May 25 | 28.657 | 1.5 | 22.11 ± 0.19 | 6.6 ± 1.2 | VLT-B | 1.11 |
| 2013 May 27 | 30.643 | 1.5 | 22.13 ± 0.07 | 6.4 ± 0.5 | VLT-B | 1.38 |
| 2013 May 28 | 31.647 | 1.5 | 22.22 ± 0.04 | 5.9 ± 0.2 | VLT-B | 0.70 |
| 2013 May 29 | 32.637 | 1.5 | 22.26 ± 0.07 | 5.7 ± 0.4 | VLT-B | 0.96 |
| 2013 June 1 | 34.649 | 1.5 | 22.25 ± 0.14 | 5.7 ± 0.7 | VLT-B | 0.75 |
| 2013 June 2 | 35.649 | 1.5 | 22.21 ± 0.06 | 6.0 ± 0.3 | VLT-B | 0.97 |
| 2013 June 3 | 37.649 | 1.5 | 22.20 ± 0.06 | 6.0 ± 0.4 | VLT-B | 0.76 |
| 2013 June 4 | 38.655 | 1.5 | 22.22 ± 0.08 | 5.9 ± 0.4 | VLT-B | 0.72 |
| 2013 June 5 | 39.649 | 1.5 | 22.22 ± 0.09 | 5.9 ± 0.5 | VLT-B | 0.93 |
| 2013 June 6 | 40.639 | 2.5 | 22.19 ± 0.08 | 6.1 ± 0.5 | VLT-B | 0.81 |
| 2013 June 10 | 44.639 | 1.5 | 22.21 ± 0.09 | 6.0 ± 0.5 | VLT-B | 0.98 |
| 2013 June 13 | 47.626 | 3.0 | 22.21 ± 0.23 | 6.0 ± 1.3 | VLT-B | 1.29 |
| 2013 June 15 | 49.649 | 1.5 | 22.24 ± 0.21 | 5.8 ± 1.1 | VLT-B | 1.57 |
| 2013 June 16 | 50.671 | 1.5 | 22.20 ± 0.18 | 6.1 ± 1.0 | VLT-B | 1.25 |
| 2013 June 17 | 51.670 | 1.5 | 22.19 ± 0.22 | 6.1 ± 1.2 | VLT-B | 0.96 |
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| 2013 May 3 | 6.724 | 1.0 | 20.31 ± 0.02 | 28.7 ± 0.6 | VLT-V | 1.16 |
| 2013 May 6 | 9.724 | 1.0 | 20.60 ± 0.03 | 22.2 ± 0.6 | VLT-V | 1.20 |
| 2013 May 8 | 11.647 | 1.0 | 20.74 ± 0.02 | 19.4 ± 0.5 | VLT-V | 0.85 |
| 2013 May 10 | 13.650 | 1.0 | 20.81 ± 0.04 | 18.2 ± 0.7 | VLT-V | 1.37 |
| 2013 May 11 | 14.649 | 1.0 | 20.84 ± 0.03 | 17.8 ± 0.4 | VLT-V | 1.15 |
| 2013 May 13 | 16.646 | 1.5 | 20.90 ± 0.03 | 16.8 ± 0.5 | VLT-V | 1.30 |
| 2013 May 14 | 17.751 | 1.5 | 20.96 ± 0.06 | 15.9 ± 0.8 | VLT-V | 0.89 |
| 2013 May 15 | 18.723 | 1.5 | 20.99 ± 0.04 | 15.4 ± 0.6 | VLT-V | 1.34 |
| 2013 May 20 | 23.677 | 3.0 | 20.85 ± 0.13 | 17.7 ± 2.2 | VLT-V | 1.17 |
| 2013 May 25 | 28.657 | 1.5 | 21.05 ± 0.08 | 14.7 ± 1.1 | VLT-V | 1.07 |
| 2013 May 27 | 30.645 | 1.5 | 21.18 ± 0.05 | 13.0 ± 0.5 | VLT-V | 1.25 |
| 2013 May 28 | 31.649 | 1.5 | 21.25 ± 0.03 | 12.2 ± 0.3 | VLT-V | 0.68 |
| 2013 May 29 | 32.639 | 1.5 | 21.25 ± 0.04 | 12.2 ± 0.4 | VLT-V | 1.03 |
| 2013 June 1 | 34.651 | 1.5 | 21.33 ± 0.06 | 11.3 ± 0.7 | VLT-V | 0.76 |
| 2013 June 2 | 35.652 | 1.5 | 21.34 ± 0.04 | 11.2 ± 0.4 | VLT-V | 1.33 |
| 2013 June 3 | 37.651 | 1.5 | 21.33 ± 0.03 | 11.3 ± 0.3 | VLT-V | 0.75 |
| 2013 June 4 | 38.657 | 1.5 | 21.31 ± 0.03 | 11.6 ± 0.4 | VLT-V | 0.91 |
| 2013 June 5 | 39.652 | 1.5 | 21.44 ± 0.04 | 10.3 ± 0.4 | VLT-V | 0.80 |
| 2013 June 6 | 40.643 | 2.5 | 21.37 ± 0.03 | 10.9 ± 0.3 | VLT-V | 0.86 |
| 2013 June 10 | 44.641 | 1.5 | 21.41 ± 0.04 | 10.5 ± 0.4 | VLT-V | 0.92 |
| 2013 June 13 | 47.628 | 3.0 | 21.48 ± 0.08 | 9.9 ± 0.7 | VLT-V | 1.62 |
| 2013 June 15 | 49.652 | 1.5 | 21.38 ± 0.06 | 10.8 ± 0.6 | VLT-V | 1.62 |
| 2013 June 16 | 50.673 | 1.5 | 21.57 ± 0.08 | 9.1 ± 0.7 | VLT-V | 0.85 |
| 2013 June 17 | 51.660 | 1.5 | 21.41 ± 0.08 | 10.5 ± 0.8 | VLT-V | 0.87 |
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| 2013 April 30 | 3.651 | 1.0 | 19.43 ± 0.06 | 54.8 ± 3.3 | TNG-r′ | 1.56 |
| 2013 May 4 | 6.726 | 1.0 | 20.07 ± 0.05 | 30.3 ± 1.4 | VLT-R | 0.88 |
| 2013 May 7 | 9.727 | 1.0 | 20.35 ± 0.03 | 23.4 ± 0.6 | VLT-R | 1.30 |
| 2013 May 8 | 11.649 | 1.0 | 20.38 ± 0.03 | 22.8 ± 0.6 | VLT-R | 1.03 |
| 2013 May 10 | 13.652 | 1.0 | 20.47 ± 0.04 | 21.0 ± 0.8 | VLT-R | 1.40 |
| 2013 May 11 | 14.657 | 1.0 | 20.52 ± 0.04 | 20.0 ± 0.7 | VLT-R | 1.21 |
| 2013 May 13 | 16.650 | 1.5 | 20.57 ± 0.03 | 19.1 ± 0.5 | VLT-R | 1.12 |
| 2013 May 14 | 17.755 | 1.5 | 20.59 ± 0.04 | 18.7 ± 0.6 | VLT-R | 0.86 |
| 2013 May 15 | 18.726 | 1.5 | 20.50 ± 0.09 | 20.4 ± 1.7 | VLT-R | 1.34 |
| 2013 May 19 | 22.607 | 1.0 | 20.69 ± 0.16 | 17.1 ± 2.7 | TNG-r′ | 1.40 |
| 2013 May 20 | 23.680 | 3.0 | 20.41 ± 0.12 | 22.2 ± 2.5 | VLT-R | 1.17 |
| 2013 May 25 | 28.660 | 1.5 | 20.72 ± 0.05 | 16.7 ± 0.8 | VLT-R | 0.90 |
| 2013 May 27 | 30.648 | 1.5 | 20.81 ± 0.04 | 15.4 ± 0.6 | VLT-R | 1.22 |
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| 2013 May 28 | 31.654 | 1.5 | 20.88 ± 0.02 | 14.4 ± 0.3 | VLT-R | 0.77 |
| 2013 May 29 | 32.757 | 1.5 | 20.20 ± 0.03 | 14.2 ± 0.4 | VLT-R | 0.97 |
| 2013 June 1 | 34.655 | 1.5 | 20.91 ± 0.06 | 14.0 ± 0.7 | VLT-R | 0.77 |
| 2013 June 2 | 35.656 | 1.5 | 20.92 ± 0.04 | 13.9 ± 0.6 | VLT-R | 1.18 |
| 2013 June 3 | 37.654 | 1.5 | 20.88 ± 0.02 | 14.3 ± 0.3 | VLT-R | 0.70 |
| 2013 June 4 | 38.660 | 1.5 | 20.94 ± 0.03 | 13.6 ± 0.4 | VLT-R | 0.87 |
| 2013 June 5 | 39.651 | 1.5 | 20.94 ± 0.03 | 13.6 ± 0.3 | VLT-R | 0.79 |
| 2013 June 6 | 40.642 | 2.5 | 20.95 ± 0.02 | 13.5 ± 0.3 | VLT-R | 0.89 |
| 2013 June 10 | 44.640 | 1.5 | 21.09 ± 0.04 | 11.8 ± 0.5 | VLT-R | 1.00 |
| 2013 June 13 | 47.627 | 3.0 | 21.05 ± 0.06 | 12.3 ± 0.7 | VLT-R | 1.34 |
| 2013 June 15 | 49.651 | 1.5 | 21.16 ± 0.09 | 11.1 ± 0.9 | VLT-R | 1.56 |
| 2013 June 16 | 50.672 | 1.5 | 21.10 ± 0.07 | 11.7 ± 0.8 | VLT-R | 1.24 |
| 2013 June 17 | 51.659 | 1.5 | 21.24 ± 0.05 | 10.3 ± 0.5 | VLT-R | 0.90 |
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| 2013 April 30 | 3.652 | 1.0 | 18.95 ± 0.06 | 65.7 ± 3.9 | TNG-i′ | 1.34 |
| 2013 May 3 | 6.727 | 1.0 | 19.40 ± 0.02 | 43.6 ± 0.9 | VLT-I | 0.91 |
| 2013 May 6 | 9.728 | 1.0 | 19.68 ± 0.03 | 33.7 ± 1.0 | VLT-I | 1.14 |
| 2013 May 8 | 11.650 | 1.0 | 19.85 ± 0.03 | 28.8 ± 0.8 | VLT-I | 0.79 |
| 2013 May 10 | 13.653 | 1.0 | 19.85 ± 0.04 | 28.7 ± 1.1 | VLT-I | 1.40 |
| 2013 May 11 | 14.658 | 1.0 | 19.85 ± 0.03 | 28.9 ± 0.9 | VLT-I | 0.73 |
| 2013 May 13 | 16.651 | 1.5 | 19.90 ± 0.05 | 27.4 ± 1.3 | VLT-I | 0.89 |
| 2013 May 14 | 17.756 | 1.5 | 19.88 ± 0.06 | 28.0 ± 1.7 | VLT-I | 0.94 |
| 2013 May 15 | 18.727 | 1.5 | 20.07 ± 0.13 | 24.7 ± 2.6 | VLT-I | 1.34 |
| 2013 May 19 | 22.593 | 1.0 | 20.02 ± 0.16 | 24.6 ± 3.6 | TNG-i′ | 1.16 |
| 2013 May 20 | 23.681 | 3.0 | 19.83 ± 0.16 | 29.3 ± 4.5 | VLT-I | 1.17 |
| 2013 May 25 | 28.661 | 1.5 | 19.88 ± 0.03 | 28.0 ± 0.9 | VLT-I | 0.92 |
| 2013 May 27 | 30.649 | 1.5 | 19.93 ± 0.04 | 26.7 ± 1.1 | VLT-I | 1.46 |
| 2013 May 28 | 31.655 | 1.5 | 20.07 ± 0.03 | 23.4 ± 0.7 | VLT-I | 0.86 |
| 2013 May 29 | 32.758 | 1.5 | 20.13 ± 0.04 | 22.3 ± 0.9 | VLT-I | 1.00 |
| 2013 June 1 | 34.656 | 1.5 | 20.13 ± 0.05 | 22.2 ± 0.9 | VLT-I | 0.71 |
| 2013 June 2 | 35.657 | 1.5 | 19.96 ± 0.04 | 26.0 ± 1.1 | VLT-I | 1.25 |
| 2013 June 3 | 37.655 | 1.5 | 20.30 ± 0.03 | 19.1 ± 0.6 | VLT-I | 0.69 |
| 2013 June 4 | 38.661 | 1.5 | 20.18 ± 0.04 | 21.2 ± 0.8 | VLT-I | 0.96 |
| 2013 June 5 | 39.652 | 1.5 | 20.27 ± 0.03 | 19.5 ± 0.6 | VLT-I | 0.76 |
| 2013 June 6 | 40.643 | 2.5 | 20.13 ± 0.03 | 22.2 ± 0.7 | VLT-I | 0.91 |
| 2013 June 10 | 44.641 | 1.5 | 20.25 ± 0.04 | 19.9 ± 0.8 | VLT-I | 0.88 |
| 2013 June 13 | 47.628 | 3.0 | 20.30 ± 0.03 | 18.9 ± 0.5 | VLT-I | 1.34 |
| 2013 June 15 | 49.652 | 1.5 | 20.33 ± 0.04 | 18.5 ± 0.7 | VLT-I | 1.49 |
| 2013 June 16 | 50.673 | 1.5 | 20.35 ± 0.04 | 18.2 ± 0.6 | VLT-I | 0.94 |
| 2013 June 17 | 51.660 | 1.5 | 20.27 ± 0.03 | 19.5 ± 0.6 | VLT-I | 1.09 |
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