Table 4
Details of fits with formula (1) to Ecyc values observed between 1996 and 2012 (excluding INTEGRAL12).
| Fit | Param. | E 0 | a | b | χ 2 | d.o.f. | F-values | Chance |
| No. | fitted | [keV] | [keV/ASM-cts/s] | [10-4 keV/d] | probab. | |||
|
|
||||||||
| 1 | E 0 | 39.12 ± 0.07 | 0.00 | 0.00 | 430 | 20 | ||
| 2 | E0, a | 39.08 ± 0.07 | 0.74 ± 0.09 | 0.00 | 357 | 19 | F(1–2) = 3.86 | 0.06 |
| 3 | E0, b | 39.29 ± 0.07 | 0.00 | −7.59 ± 0.39 | 45.0 | 19 | F(1–3) = 163 | 9 × 10-11 |
| 4 | E0, a, b | 39.25 ± 0.07 | 0.44 ± 0.09 | −7.22 ± 0.39 | 20.4 | 18 | F(3–4) = 131 | 5 × 10-5 |
Notes. The reference flux is F0 = 6.8 (ASM-cts/s) and the reference time is T0 = MJD 53 500. The F-values are calculated according to the following formula: 
× d.o.f.(2). The last column gives the F-test probability that the improvement in χ2 (by adding one additional free parameter) is just by chance.
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