Table 2: Spectral analysis results for GRB 040106 with SPI and IBIS/ISGRI for two intervals around the prominent peaks of emission. Errors quoted are for 1 parameter of interest at 1$\sigma $ confidence level. Fluxes are quoted for the energy range 20-200 keV. Within the large errors on the spectral fits, results are consistent between instruments.
Interval Parameter SPI IBIS / ISGRI
1st pulse Photon index -1.47+0.52-0.59 $-1.70\pm0.12$
(9 s) Flux (erg cm-2 s-1) $5.9\times10^{-8}$ $2.5\times10^{-8}$
2nd pulse Photon index -1.32+0.31-0.34 $-1.41\pm0.1$
(8 s) Flux (erg cm-2 s-1) $6.1\times10^{-8}$ $3.2\times10^{-8}$


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