Table 3: IBIS and SPI spectral properties of GRBs for which Band and quasithermal (PL + BB) models are fit to spectra. Parameters quoted are low energy power-law index, $\alpha $, high energy power-law index, $\beta $, and break energy, E0, for Band model fits and temperature, kT and power-law index, $\Gamma $ for quasithermal model fits.
    Band model Quasithermal model
GRB   $\alpha $ $\beta $ E0 (keV) $\chi ^2$ /d.o.f. kT $\Gamma $ $\chi ^2$ /d.o.f.
GRB 030131 IBIS $-1.40\pm0.20$ $-3.0\pm1.0$ $70\pm20$ 22.5/16 -- -- --
GRB 040422 IBIS $-1.26\pm0.08$ -3  $^\dagger$ $55\pm31$ 42.0/35 $14\pm2$ $-2.49\pm0.48$ 38.4/34
  SPI $-2.17\pm0.28$ (PL) 7.5/3 -- -- --
GRB 041218 IBIS $-1.15\pm0.20$ $-2.08\pm0.16$ $80\pm40$ 64.4/35 $14\pm2$ $-1.76\pm0.08$ 64.1/35
  SPI $-0.97\pm0.47$1 -3  $^\dagger$ $116\pm152$ 20.0/35 $26\pm9$ $-1.82\pm0.38$ 19.4/34
GRB 041219a IBIS -1.67  $^\dagger$ $-1.92\pm0.02$ $114\pm144$ 184.0/157 $30\pm12$ $-2.03\pm0.07$ 109.6/87
  SPI $-1.48\pm0.08$ $-1.92\pm0.13$ $365.9\pm192$ 51.9/30 $29\pm3$ $-1.77\pm0.03$ 17.6/18
GRB 050502a IBIS $-0.89\pm0.25$ -3  $^\dagger$ $83\pm44$ 34.7/38 $17\pm2$ $-1.64\pm0.11$ 33.2/41
GRB 050525a IBIS $-0.94\pm0.45$ -3  $^\dagger$ $65\pm62$ 59.2/31 $18\pm4$ $-2.05\pm0.58$ 60.1/31
  SPI $-1.37\pm0.23$ -3  $^\dagger$ $127\pm45$ 46.9/51 $26\pm4$ $-2.24\pm0.15$ 46.0/50
GRB 050918 IBIS $-1.42\pm0.51$ -3  $^\dagger$ $117\pm1484$ 26.4/29 $21\pm5$ $-2.44\pm1.22$ 23.8/28
  SPI $-1.28\pm2.58$ -3  $^\dagger$ $69\pm890$ 4.4/7 $15\pm11$ $-2.24\pm3.22$ 3.8/6
GRB 060428c IBIS/SPI $-0.71\pm0.26$ -2.0 $54\pm14$ 32.3/33 -- -- --
GRB 060901 IBIS $-1.47\pm0.20$ -3  $^\dagger$ $998\pm9002$ 40.2/30 $36\pm11$ $-1.91\pm0.39$ 34.8/29
  SPI $-0.50\pm0.61$ $-1.89\pm0.42$ $85\pm151$ 9.0/14 $28\pm11$ $-1.54\pm0.15$ 14.0/14
GRB 061025 IBIS $-0.85\pm0.43$ -3  $^\dagger$ $94\pm134$ 38.3/29 $15\pm6$ $-1.38\pm0.30$ 35.6/28
  SPI $-1.57\pm0.25$ (PL) 10.4/6 $17\pm6$ $-0.75\pm2.65$ 7.2/5
GRB 061122 IBIS $-0.97\pm0.40$ $-2.00\pm0.12$ $56\pm52$ 47.4/30 $12\pm3$ $-1.72\pm0.12$ 48.6/30
  SPI $-0.98\pm0.12$ $-2.72\pm0.85$ $166\pm39$ 66.6/56 $36\pm3$ $-1.81\pm0.08$ 67.8/56

$\dagger$ Parameter frozen.


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