Table 4: GRB050219a BAT time-resolved spectral fits.
  Segment 1 Segment 2 Segment 3 Segment 4 Segment 4+5
duration (s) 8 6 4 7 14
$\Gamma$ $\rm -0.59^{+0.59}_{-0.65}$ $\rm -0.34^{+0.44}_{-0.58}$ $\rm0.23^{+0.42}_{-0.47}$ $\rm0.42^{+0.40}_{-0.56}$ $\rm0.75^{+0.50}_{-0.56}$
$E_{\rm peak}^{\dagger}$ $\rm 90.9^{+9.3}_{-8.0}$ $\rm 94.3^{+8.4}_{-7.5}$ $\rm 123.0^{+18.1}_{-14.1}$ $\rm 67.6^{+7.9}_{-6.8}$ $\rm 62.3^{+9.5}_{-7.4}$
$\chi^{2}$/ d.o.f. 44.2/55 36.4/55 62.5/55 41.7/55 57.7/55
$\dagger$ The error on $E_{\rm peak}$ is the 90% confidence limit for a fixed value of
the high energy cut-off $E_{\rm HighEcut}$, where $E_{\rm peak}=(2-\Gamma)\times E_{\rm HighEcut}$.

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