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Table 2.

Fits to the prompt emission spectra.

Spectrum (a) Instruments Model (f) Time interval α Epeak or νm Ebreak or νc Flux (15−1500 keV) χ2 (d.o.f.)
(relative to T0, s) (photon index) (keV) (keV) (10−7 erg cm−2 s−1)

‘peak’ (b) BAT+KW CPL [−0.465, 2.479] 40.2 (58)
Pulse 1 BAT+KW CPL [−29.905, 11.311] 36.5 (58)
Pulse 1 BAT+KW DBPL [−29.905, 11.311] 127 35.2 (56)
X-ray flare (c) XRT+KW DBPL [80.0, 120.0] Unconstrained 225.9 (281)
Pulse 2 (c) XRT+BAT+KW CPL [343.983, 426.415] 48.6 (58)
Pulse 2 (c) XRT+BAT+KW DBPL [343.983, 426.415] 50 714.2 (714)
Pulse 3 (d) BAT CPL [747.311, 797.359] 55.2 (58)
Pulse 3 (e) KW CPL [747.311, 862.127] 0 (0) (e)
Pulse 3 (d),(g) REM+BAT+KW DBPL [747.311, 797.359] 154 0.006 (g) 59.3 (56)

Notes.

(a)

All spectra, except the first, are time-averaged.

(b)

This spectrum was used to calculate the peak energy flux.

(c)

The interval covered by XRT.

(d)

The interval covered by BAT.

(e)

KW-only fit; for the CPL model, the 3-channel fit has 0 degrees of freedom.

(f)

CPL stands for cut-off power-law. DBPL stands for double-broken power-law, used for the synchrotron model. In this last case, the power-law indices were fixed as described in Sect. 3.2.

(g)

This break was fixed to match the H-band data.

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