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Table 2

Summary of the best-fit models and parameters of the 22 GRBs analyzed in this paper.

GRB Redshift Model Ext. Curve β o a A V E break Norm. χ 2 T SED b
(yymmdd#) fixed to (mag) (keV) (keV/cm2/s/keV) (d.o.f.) (h)
071025 4.900 bknpow smc 1.45 × 10-2 2.78 × 10-4 40.1 (36) 1.11 22.4
080825B 4.310 bknpow smc 9.93 × 10-3 1.82 × 10-3 2.9 (5) 0.58 12.4
080913 6.733 pow smcd ............. 1.02 × 10-3 9.9 (12) 0.83 0.2
080916C 4.280 bknpow smcd 9.99 × 10-3 1.15 × 10-3 12.3 (13) 0.95 32.6
090205A 4.650 bknpow lmc 1.24 × 10+ 0 1.61 × 10-4 9.2 (9) 1.02 7.1
090423A 8.260 pow smc ............. 4.37 × 10-5 28.0 (31) 0.90 17.3
090429Bc 9.380 bknpow lmc 1.21 × 10+ 0 1.81 × 10-4 2.2 (4) 0.55 2.9
090516A 4.109 pow smc ............. 1.62 × 10-4 17.1 (23) 0.74 15.3
100219A 4.667 pow smc ............. 2.22 × 10-4 4.2 (9) 0.47 11.4
100513Ac 4.772 bknpow smc 9.94 × 10-3 6.30 × 10-3 0.8 (3) 0.27 1.0
100905A 7.880 bknpow mwd 9.30 × 10-1 4.10 × 10-5 0.9 (3) 0.30 16.0
111008A 4.990 bknpow smc 9.98 × 10-3 9.28 × 10-3 27.0 (19) 1.42 6.8
120712A 4.175 bknpow smc 9.99 × 10-3 9.49 × 10-4 9.5 (9) 1.06 10.6
130606A 5.931 pow smcd ............. 1.83 × 10-4 7.1 (11) 0.65 8.4
131117A 4.042 bknpow smc 1.00 × 10-2 2.51 × 10-2 10.4 (8) 1.30 0.1
140304Ac 5.283 pow smcd ............. 2.04 × 10-4 10.4 (6) 1.33 14.4
140311A 4.954 pow smc ............. 2.08 × 10-4 20.6 (17) 1.21 9.8
140428A 4.680 bknpow mw 9.33 × 10-1 1.25 × 10-4 7.2 (5) 1.44 2.6
140515A 6.327 pow smcd ............. 1.36 × 10-4 3.7 (6) 0.62 14.6
140614A 4.233 bknpow smc 1.89 × 10+ 0 2.83 × 10-4 5.2 (8) 0.65 4.1
151027B 4.062 bknpow lmc 1.00 × 10-2 4.21 × 10-3 18.7 (16) 1.17 8.8
151112A 4.270 bknpow lmc 1.36 × 10+ 0 2.59 × 10-4 21.4 (25) 0.86 11.4
071025 4.900 bknpow sn 9.99 × 10-3 3.40 × 10-4 41.9 (36) 1.16 22.4
090205 4.900 pow sn ... 1.31 × 10-4 13.7 (10) 1.37 7.1
090429Bc 9.380 bknpow sn 1.19 × 10+ 0 1.75 × 10-4 2.2 (4) 0.55 2.9
090516A 4.109 pow sn ............. 1.63 × 10-4 26.4 (23) 1.15 15.3
100219A 4.667 pow sn ............. 2.21 × 10-4 5.9 (9) 0.66 11.4
111008A 4.990 bknpow sn 9.96 × 10-3 9.47 × 10-3 28.1 (19) 1.48 6.8
140428A 4.680 bknpow sn 2.36 × 10-1 2.36 × 10-3 5.8 (5) 1.16 2.6
140614A 4.233 bknpow sn 9.94 × 10-3 2.89 × 10-3 5.6 (8) 0.70 4.1
151027B 4.062 bknpow sn 9.93 × 10-3 3.31 × 10-3 16.8 (16) 1.05 8.8
151112A 4.270 bknpow sn 1.35 × 10+ 0 2.59 × 10-4 23.0 (25) 0.92 11.4

Notes. In the top section of the table we list the best-fit parameters from fitting the local extinction curves. In case we found evidence for a medium amount of dust (AV> 0.1 mag), we also fitted the SN extinction curve, for which the corresponding best-fit parameters are listed at the bottom part of the table.

(a)

Spectral slope in the NIR/optical wavelength regime. In case the SED is best-fit with a broken power law (bknpow) the slope in the X-ray is fixed to βx = βo + 0.5, otherwise (pow) βx = βo (see Sect. 3.6)

(b)

The common reference time where the broadband SED was created – in hours after the prompt trigger.

(c)

Fit not performed with GROND data (see Sect. 3.7).

(d)

The extinction curve can basically not be identified since there is no evidence for extinction or the AV is consistent with zero. However, we list the model resulting in the lowest .

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