Last updated using ObsID 00287364000, version 22;
The BAT spectrum was fitted with a cut-off power-law. The cutoff energy was 35.9 keV and was not allowed to evolve. See caveats for details.
All data uses absorption NH=0.018 × 1022 cm-2 at z=0 and 0.81 × 1022 cm-2 at z=2.17.
(Source: the late-time spectrum from the XRT spectrum repository).