Last updated using ObsID 00350311000, version 6;
The BAT spectrum was fitted with a cut-off power-law. The cutoff energy was 136.5 keV and was not allowed to evolve. See caveats for details.
All data uses absorption NH=0.019 × 1022 cm-2 at z=0 and 0.42 × 1022 cm-2 at z=0.544.
(Source: the late-time spectrum from the XRT spectrum repository).