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Table 2

Linear fits to the log B – log ρ profiles obtained from the long-slit spectroscopic measurements, giving the slope m.

Date Direction Continuum regions
482–485 nm 520–525 nm 680–690 nm 443 nm 684 nm
2010 cont1 cont2 cont3 BC RC

October 27 70°a –0.51 –0.50 –0.47
     250° –1.09 –1.19 –1.80
azimuthal averageb –0.98 –1.02
–1.03 –1.03
October 29 east –0.61 –0.56
     west –1.07 –1.12 –1.32
azimuthal averageb –0.98 –0.94
–0.96

Notes. mSlope of the linear fit log B vs. log ρ for 2.0 ≤ log ρ ≤ 4 (i.e. 100 ≤ ρ ≤ 10   000 km). Standard deviation of these fits is always lower than 5%;

(a)

the fits in this direction have a considerably higher standard deviation, which is caused by the existence of the jet on October 27;

(b)

a radius ρ equal to 50″ (i.e.  ~4700 and  ~4800 km on October 27 and 29, 2010 respectively) has been used to compute the slope of the linear fit.

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