Table 3: Goodness of fit for additive models during the three observations. The $\chi _{\nu } ^{2}$ is shown as well as the degrees of freedom (in parentheses). The name of the models are written in XSPEC terminology. All models include photoelectric absorption.
Model XTE-1997 SAX-1998 XTE-2001

po 17(54) 2.11(115) 8.45(51)

highecut(po) 0.71(52) 1.32(113) 1.27(49)

po + bb 0.94(52) 1.24(117) 0.96(49)

po + diskbb 0.98(52) 1.26(117) 1.31(49)

bremss 3.05(54) 1.52(115) 2.59(51)

raymond 17.83(54) 1.87(115) 10.65(51)

**Table 3:** Goodness of fit for additive models during the three observations. The $\chi _{\nu } ^{2}$ is shown as well as the degrees of freedom (in parentheses). The name of the models are written in XSPEC terminology. All models include photoelectric absorption.
Model	XTE-1997	SAX-1998	XTE-2001
po	17(54)	2.11(115)	8.45(51)
highecut(po)	0.71(52)	1.32(113)	1.27(49)
po + bb	0.94(52)	1.24(117)	0.96(49)
po + diskbb	0.98(52)	1.26(117)	1.31(49)
bremss	3.05(54)	1.52(115)	2.59(51)
raymond	17.83(54)	1.87(115)	10.65(51)

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