The velocity field of sunspot penumbrae - I. A global view

Open Access

Table 2:

Wavelength calibration using umbral Stokes V profiles.
Name	CBS [m s^-1]		rms^a [m s^-1]
	Fe I 630.15	Fe I 630.25	Fe I 630.15	Fe I 630.25
Spot A	-231	-296	93	83
Spot B	-245	-315	94	82
Spot C	-201	-295	100	92
Spot D	-231	-344	147	107

^a These values represent the variation of the center position of umbral Stokes V profiles with $\vert\delta a \vert< 0.01$ .

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