Table 1: Results of the spectrum fits for three time ranges of the GRB 030406. All the errors are at the $1\sigma $ level.
Part of duration broken power law fit blackbody fit
the GRB [s] $\alpha$ $\beta$ $E_{\rm break}$ [keV] $\chi^2/$d.o.f. kT [keV] $\chi^2/$d.o.f.
precursor 7.3 $\rm0.0^{+0.3}_{-0.3}$ $\rm 9.0^{+1}_{-6}$ $\rm 490^{+40}_{-180}$ 0.96 $\rm 106^{+12}_{-13}$ 0.82

peak
2.81 $\rm -1.5^{+0.7}_{-1.0}$ $\rm 1.7^{+0.4}_{-0.3}$ $\rm 390^{+60}_{-50}$ 1.19 -

peak$^\dagger$
  $\rm -2.5^{+1.5}_{-0.5}$ $\rm 1.7^{+0.2}_{-0.2}$ $\rm 300^{+30}_{-30}$ 0.49 -

tail
4.3 $\rm -0.8^{+0.7}_{-2.2}$ $\rm 2.8^{+1.2}_{-0.6}$ $\rm 270^{+70}_{-50}$ 0.56 $\rm 140^{+20}_{-20}$ 0.56

NOTE: $^\dagger$ data fitted with variable normalization for both sub-instruments. See text.

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