Table 2
GRB spectral fits.
| GRB | NH(Gal) * | Gal. latitude | NH(z) | Power-law | C-stat |
| 1020 cm-2 | (b deg) | 1021 cm-2 | photon index | (dof) | |
|
|
|||||
| GRB 060729 | 5.39 (4.49) | –27.3 |
|
|
1778.0 (1643) |
| GRB 061121 | 4.79 (4.00) | +30.1 |
|
|
1412.8 (1449) |
| GRB 080411 | 4.63 (5.79) | –43.6 |
|
|
1596.9 (1545) |
| GRB 090618 | 5.70 (5.79) | +24.3 |
|
|
1709.6 (1652) |
| GRB 120711A | 6.31 (7.89) | –28.2 |
|
|
1689.1 (1616) |
|
|
|||||
| GRB 111209 | 1.78 (1.48) | –70.3 |
|
|
1057.9 (993) |
Notes.
Galactic column densities refer to the Kalberla et al. (2005) value. The quoted value is derived from the fit leaving the Galactic column density free to vary within an interval ± 20% of the Kalberla et al. (2005) value. The Kalberla et al. (2005) values are instead reported in parenthesis. Errors have been computed for ΔC = 2.71 (90% confidence level for one parameter of interest). For GRB 111209A we added a black-body component with kT = 0.22 ± 0.01 keV and equivalent radius R = (1.3 ± 0.2) × 1011 cm.
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