Table 2: Log of the spectral fits of the last pulse of the prompt emission and of the X-ray afterglow with a photoelectrically absorbed power law. The energy band and exposures are the same reported in Table 1. The quoted uncertainties are at 90% confidence level.
Observation $N_{\rm H}$ $\Gamma$ $\chi^2_\nu$

(10²¹ $\rm cm^{-2}$ )

Prompt emission [0.29] $\rm 2.22_{-0.25}^{+0.31}$ 7.4/8

(second pulse)

MECS TOO 1 [0.29] $\rm 2.0_{-1.1}^{+2.2}$ 5.1/1

ACIS-S TOO 1 [0.29] $\rm 1.5_{-0.5}^{+0.5}$ 4.7/2

**Table 2:** Log of the spectral fits of the last pulse of the prompt emission and of the X-ray afterglow with a photoelectrically absorbed power law. The energy band and exposures are the same reported in Table 1. The quoted uncertainties are at 90% confidence level.
Observation	$N_{\rm H}$	$\Gamma$	$\chi^2_\nu$
	(10²¹ $\rm cm^{-2}$ )
Prompt emission	[0.29]	$\rm 2.22_{-0.25}^{+0.31}$	7.4/8
(second pulse)
MECS TOO 1	[0.29]	$\rm 2.0_{-1.1}^{+2.2}$	5.1/1
ACIS-S TOO 1	[0.29]	$\rm 1.5_{-0.5}^{+0.5}$	4.7/2

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