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Table A.1

Optical magnitudes of the afterglow of GRB 120815A as measured by GROND.

Time Exposurea Brightnessb
g′-band r′-band i′-band z′-band
(ks after T0)c (s) (magAB) (magAB) (magAB) (magAB)
0.169 35 18.92 ± 0.03 18.03 ± 0.01 17.60 ± 0.02 17.32 ± 0.02
0.273 35 18.85 ± 0.03 17.95 ± 0.01 17.52 ± 0.02 17.25 ± 0.02
0.375 35 18.75 ± 0.03 17.87 ± 0.01 17.45 ± 0.02 17.16 ± 0.02
0.482 35 18.75 ± 0.02 17.88 ± 0.02 17.47 ± 0.02 17.19 ± 0.02
0.698 115 18.85 ± 0.02 18.01 ± 0.01 17.58 ± 0.01 17.32 ± 0.02
0.884 115 19.02 ± 0.02 18.16 ± 0.01 17.75 ± 0.02 17.48 ± 0.02
1.069 115 19.14 ± 0.01 18.27 ± 0.01 17.85 ± 0.01 17.60 ± 0.02
1.256 115 19.21 ± 0.01 18.36 ± 0.01 17.95 ± 0.02 17.66 ± 0.02
1.451 115 19.31 ± 0.01 18.44 ± 0.01 18.04 ± 0.02 17.76 ± 0.02
1.638 115 19.38 ± 0.01 18.50 ± 0.01 18.08 ± 0.01 17.80 ± 0.02
1.834 115 19.41 ± 0.01 18.57 ± 0.01 18.14 ± 0.02 17.86 ± 0.02
2.027 115 19.49 ± 0.01 18.62 ± 0.01 18.19 ± 0.02 17.92 ± 0.02
2.361 375 19.58 ± 0.01 18.71 ± 0.01 18.29 ± 0.01 18.02 ± 0.02
2.807 375 19.70 ± 0.01 18.84 ± 0.01 18.38 ± 0.02 18.13 ± 0.02
3.258 375 19.79 ± 0.02 18.91 ± 0.01 18.47 ± 0.02 18.18 ± 0.02
3.707 375 19.89 ± 0.01 19.00 ± 0.01 18.59 ± 0.03 18.30 ± 0.02
4.165 375 19.95 ± 0.01 19.09 ± 0.01 18.65 ± 0.02 18.38 ± 0.02
4.607 375 20.02 ± 0.02 19.16 ± 0.01 18.72 ± 0.02 18.44 ± 0.02
5.052 375 20.13 ± 0.02 19.21 ± 0.02 18.81 ± 0.02 18.50 ± 0.03
5.498 375 20.18 ± 0.03 19.29 ± 0.01 18.91 ± 0.02 18.56 ± 0.02
6.037 4 × 35 20.29 ± 0.02 19.37 ± 0.03 18.95 ± 0.03 18.67 ± 0.03
6.465 4 × 35 20.32 ± 0.04 19.43 ± 0.03 18.93 ± 0.04 18.77 ± 0.04
6.895 4 × 35 20.36 ± 0.05 19.48 ± 0.02 19.02 ± 0.03 18.80 ± 0.03
7.326 4 × 35 20.39 ± 0.03 19.57 ± 0.02 19.10 ± 0.03 18.84 ± 0.04
7.763 4 × 35 20.42 ± 0.04 19.60 ± 0.03 19.17 ± 0.03 18.97 ± 0.04
8.196 4 × 35 20.44 ± 0.05 19.62 ± 0.02 19.18 ± 0.03 18.93 ± 0.04
8.631 4 × 35 20.54 ± 0.04 19.67 ± 0.02 19.27 ± 0.03 19.03 ± 0.03
9.062 4 × 35 20.58 ± 0.04 19.69 ± 0.02 19.25 ± 0.03 19.01 ± 0.03
9.497 4 × 35 20.63 ± 0.04 19.75 ± 0.02 19.27 ± 0.03 19.13 ± 0.04
9.927 4 × 35 20.63 ± 0.04 19.82 ± 0.02 19.37 ± 0.03 19.13 ± 0.03
10.363 4 × 35 20.75 ± 0.03 19.83 ± 0.03 19.39 ± 0.03 19.18 ± 0.04
10.623 4 × 35 20.79 ± 0.04 19.86 ± 0.02 19.43 ± 0.03 19.24 ± 0.04
11.053 4 × 35 20.81 ± 0.06 19.91 ± 0.03 19.48 ± 0.04 19.22 ± 0.04

Notes.

(a)

Integration time of the individual image. Stacked images are given as number of images times exposure of an individual image.

(b)

All magnitudes in this table are in the AB system and uncorrected for Galactic foreground extinction. The quoted error is statistical only, and there is an additional systematic error in the absolute photometric calibration, which is estimated to be around 0.04 mag in g′r′i′z′.

(c)

T0 is set as the time of the Swift/BAT trigger, i.e., 2012-08-15 02:13:58 UT.

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