Table 1: Spectral parameters for GRB 070707 fit by a simple power-law model for IBIS/ISGRI and SPI and a joint fit to both instruments. The columns list the values for the photon index $\alpha $, the best fit reduced $\chi ^2_{\rm r}$ per degrees of freedom (d.o.f.), and fluence in the energy range 20-200 keV. The final two rows list the best fit parameters of the cutoff power-law model when fit to the joint data.

Interval		 $\alpha $ $\chi ^2_{\rm r}$ Fluence
    /d.o.f. (20-200 keV)
      ( $\times 10^{-7}$ erg cm-2)
PL Fit:      
Rise Time (ISGRI) $\rm -1.26~^{+0.21}_{-0.20}$ 1.25/24 $\rm 2.04~^{+0.06}_{-0.52}$
Fall Time (ISGRI) $\rm -1.36~^{+1.24}_{-1.22}$ 1.14/6 $\rm0.44~^{+0.05} _{-0.36}$
T90 (ISGRI) $\rm -1.19~^{+0.19}_{-0.18}$ 1.24/26 $\rm 1.98~^{+0.05}_{-0.43}$
T90 (SPI) $\rm -1.19~^{+0.23}_{-0.20}$ 0.59/15 $\rm 2.58~^{+0.10}_{-0.75}$
T90 (Joint Fit) $\rm -1.19~^{+0.14}_{-0.13}$ 1.09/47 $\rm 2.07~^{+0.06}_{-0.32}$
Cutoff PL Fit: $\rm -1.04~^{+0.26}_{-0.33}$ 1.11/45 $\rm 2.11~^{+0.11}_{-0.81}$
(T90, Joint Fit) $E_0 = 673~^{\rm +786}_{-270}$ keV, $E_{\rm peak} = 645~^{+766}_{-330}$ keV


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