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Table 1.
Spectral parameters used to model the GRB afterglow and WHIM filaments in all simulations.
| Model component | Model parameter | Value | References |
|---|---|---|---|
| Local galaxy | Galactic absorption | 2 × 1020 cm−2 | |
| GRB afterglow | Redshift, zGRB | 2.0 | 1 |
| Intrinsic absorption | 1 × 1022 cm−2 | 1 | |
| Photon index | 2.0 | 1 | |
| O VII line at 574 eV | Redshift, zWHIM | 0.0−0.5 | |
| Equivalent width, EWO VII | 0.07−0.42 eV | 2, 3 | |
| σ | 0.1 eV (b = 73 km s−1, T ≈ 5 × 106 K) | 4 | |
| O VIII line at 654 eV (2 line only) | Redshift, zWHIM | 0.0−0.5 | |
| Equivalent width, EWO VIII | 2/3 of O VII | 4 | |
| σ | 0.1 eV (b = 65 km s−1, T ≈ 4 × 106 K) | 4 | |
References. (1) Evans et al. (2009); (2) Branchini et al. (2009); (3) Nicastro et al. (2018); (4) Brand et al. (2016).
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