Table 5
Parameters of the SED modelling of the AG.
| GRB | β X | A V,host | E break | N H,host | χ 2 / μ |
| [mag] | [eV] | [1021 cm-2] | |||
|
|
|||||
| 081007 | 0.97 ± 0.09 | 0.68 ± 0.08 (SMC) |
|
5.6 ± 0.7 | 1.1 |
| 091127a | 0.748 ± 0.004 | <0.03 (LMC) | 2.6–29.9 | 0.32 ± 0.06 | 1.1 |
| 101219B | 1.12 ± 0.01 | 0.12 ± 0.01 (SMC) | 9.0 fixed | 0.6 ± 0.3 | 0.8 |
Notes. Obeying the fireball model for GRB AGs, the high-energy (βX) and the low-energy (βopt) spectral indexes are correlated by βX = βopt + 0.5 for Ebreak ≈ Ecooling, where the latter comes from the cooling frequency of the electrons, except in the case of GRB 091127 were βopt varies in the range 0.25–0.62.
The quoted values of βX, NH,host, and reduced χ2 are computed from the simultaneous best fit to all eight GROND/XRT SEDs by Filgas et al. (2011). The Ebreak range comes from an observed evolution of βopt. The AV,host upper limit was taken from Schady et al. (2012).
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