Table 1
Observation log for GRB 120422A / SN 2012bz.
| Δt | texp | Filt. | Mag | Flux | Instrument | Δt | texp | Filt. | Mag | Flux | Instrument |
| (days) | (min) | (10-3 mJy) | (days) | (min) | (10-3 mJy) | ||||||
|
|
|||||||||||
| 11.714 | 2.0 | U | >21.1 | >5.86 | VLT/FORS2 | 14.619 | 10.0 | r ′ | 21.25 ± 0.05 | 11.48 ± 0.53 | TNG/LRS |
| 13.678 | 2.0 | U | >21.0 | >5.86 | VLT/FORS2 | 20.610 | 10.0 | r ′ | 21.45 ± 0.07 | 9.55 ± 0.61 | TNG/LRS |
| 4.697 | 6.5 | B | 23.46 ± 0.10 | 1.70 ± 0.15 | VLT/FORS2 | 30.608 | 10.0 | r ′ | 21.78 ± 0.14 | 7.05 ± 0.90 | TNG/LRS |
| 6,674 | 3.0 | B | 23.07 ± 0.08 | 2.44 ± 0.18 | VLT/FORS2 | 35.612 | 15.0 | r ′ | 21.85 ± 0.15 | 6.60 ± 0.91 | TNG/LRS |
| 11.715 | 1.0 | B | >22.3 | >4.97 | VLT/FORS2 | 4.712 | 3.0 | R | 21.79 ± 0.02 | 5.97 ± 0.11 | VLT/FORS2 |
| 13.680 | 1.0 | B | 22.80 ± 0.20 | 3.13 ± 0.57 | VLT/FORS2 | 8.709 | 3.0 | R | 21.36 ± 0.04 | 8.87 ± 0.32 | VLT/FORS2 |
| 25.700 | 1.0 | B | 23.56 ± 0.06 | 1.56 ± 0.09 | VLT/FORS2 | 11.719 | 1.0 | R | 21.23 ± 0.08 | 10.00 ± 0.73 | VLT/FORS2 |
| 27.710 | 1.0 | B | 23.51 ± 0.06 | 1.63 ± 0.09 | VLT/FORS2 | 13.684 | 1.0 | R | 21.14 ± 0.08 | 10.87 ± 0.80 | VLT/FORS2 |
| 30.677 | 4.0 | B | 23.73 ± 0.09 | 1.33 ± 0.11 | VLT/FORS2 | 25.707 | 1.0 | R | 21.30 ± 0.03 | 9.37 ± 0.26 | VLT/FORS2 |
| 4.568 | 5.0 | g ′ | 22.82 ± 0.11 | 2.70 ± 0.27 | TNG/LRS | 27.707 | 1.0 | R | 21.32 ± 0.05 | 9.21 ± 0.42 | VLT/FORS2 |
| 6.593 | 5.0 | g ′ | 22.69 ± 0.11 | 3.05 ± 0.30 | TNG/LRS | 30.683 | 1.0 | R | 21.46 ± 0.04 | 8.09 ± 0.29 | VLT/FORS2 |
| 9.628 | 15.0 | g ′ | 22.43 ± 0.09 | 3.87 ± 0.32 | TNG/LRS | 6.558 | 5.0 | i ′ | 21.80 ± 0.12 | 6.92 ± 0.76 | TNG/LRS |
| 11.577 | 15.0 | g ′ | 22.37 ± 0.07 | 4.09 ± 0.26 | TNG/LRS | 9.581 | 15.0 | i ′ | 21.54 ± 0.05 | 8.79 ± 0.40 | TNG/LRS |
| 14.566 | 15.0 | g ′ | 22.40 ± 0.06 | 3.98 ± 0.22 | TNG/LRS | 12.670 | 10.0 | i ′ | 21.40 ± 0.04 | 10.03 ± 0.37 | TNG/LRS |
| 20.562 | 10.0 | g ′ | 22.60 ± 0.15 | 3.31 ± 0.45 | TNG/LRS | 14.596 | 10.0 | i ′ | 21.39 ± 0.05 | 10.09 ± 0.46 | TNG/LRS |
| 30.619 | 10.0 | g ′ | 23.11 ± 0.18 | 2.07 ± 0.34 | TNG/LRS | 20.589 | 10.0 | i ′ | 21.26 ± 0.06 | 11.38 ± 0.63 | TNG/LRS |
| 4.707 | 3.0 | V | 21.89 ± 0.03 | 6.57 ± 0.18 | VLT/FORS2 | 30.596 | 10.0 | i ′ | 21.51 ± 0.14 | 9.04 ± 1.16 | TNG/LRS |
| 11.718 | 1.0 | V | 21.34 ± 0.08 | 10.74 ± 0.79 | VLT/FORS2 | 35.573 | 18.0 | i ′ | 21.65 ± 0.15 | 7.94 ± 1.09 | TNG/LRS |
| 13.682 | 1.0 | V | 21.29 ± 0.08 | 11.25 ± 0.82 | VLT/FORS2 | 4.707 | 3.0 | I | 21.62 ± 0.06 | 5.47 ± 0.30 | VLT/FORS2 |
| 25.706 | 1.0 | V | 21.67 ± 0.03 | 7.93 ± 0.22 | VLT/FORS2 | 8.716 | 3.0 | I | 21.21 ± 0.08 | 7.98 ± 0.59 | VLT/FORS2 |
| 27.706 | 1.0 | V | 21.62 ± 0.06 | 8.30 ± 0.46 | VLT/FORS2 | 11.721 | 1.0 | I | 20.93 ± 0.06 | 10.33 ± 0.57 | VLT/FORS2 |
| 30.682 | 1.0 | V | 21.86 ± 0.07 | 6.65 ± 0.43 | VLT/FORS2 | 13.685 | 1.0 | I | 20.84 ± 0.08 | 11.22 ± 0.83 | VLT/FORS2 |
| 4.580 | 5.0 | r ′ | 21.85 ± 0.10 | 6.60 ± 0.60 | TNG/LRS | 25.708 | 1.0 | I | 20.90 ± 0.05 | 10.62 ± 0.49 | VLT/FORS2 |
| 6.582 | 5.0 | r ′ | 21.64 ± 0.08 | 8.02 ± 0.59 | TNG/LRS | 27.709 | 1.0 | I | 20.85 ± 0.07 | 11.12 ± 0.72 | VLT/FORS2 |
| 9.606 | 15.0 | r ′ | 21.48 ± 0.04 | 9.29 ± 0.34 | TNG/LRS | 30.685 | 1.0 | I | 20.93 ± 0.05 | 10.33 ± 0.47 | VLT/FORS2 |
| 12.650 | 10.0 | r ′ | 21.39 ± 0.04 | 10.09 ± 0.37 | TNG/LRS | 14.643 | 20.0 | z ′ | 21.64 ± 0.08 | 8.02 ± 0.59 | TNG/LRS |
Notes. Δt refers to the beginning of the observations and corresponds to the delay since the burst event. UBVRI magnitudes are in the Vega system, g′r′i′z′ magnitudes are in the AB system, and they have not been corrected for Galactic absorption. Errors are given at the 1σ confidence level.
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