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sum_hor_mag_grad.pro

Calculates the sum of the horizontal magnetic field and the separation distance between the leading and the following polarity subgroups

sum_hor_mag_grad,c_img_blos,c_img_cont,g_s,slf,d_l_f,weight_cent,lead_cent,foll_cent,fit_coeff=fit_coeff,minsize=minsize

c_img_blos : B_los HARP cutout magnetogram, corrected for limb presence and deproject.

c_img_blos : continuum HARP image, corrected for limb presence.

fit_coeff: The coefficients K₁ and K₂ for the empirical relation <B>=f(A) (see Korsós et al. 2014)

Min_size : minimum size of detected umbra (in MSH). Default equal to 0.5 (in accordance with the Debrecen Observatory limit)

Output:

g_s: The sum of the horizontal magnetic gradient according to Korsos & Erdelyi (2016)

slf: the seperation distance

d_l_f: the distance between leading and following

weight_cent: the weighted centroid

lead_cent: weighted centroid of the leading subgroup

foll_Cent: weighet centroid of the following subgroup

Property name in DB:

gs_slf.g_s, gs_slf.slf, gs_slf.d_l_f, gs_slf.weight_cent, gs_slf.lead_cent, gs_slf.foll_cent, gs_slf.fit_coeff

Repository:

M. B. Korsós et al. 2014 The Astrophysical Journal, 789, 107

M. B. Korsós et al. 2015 The Astrophysical Journal Letters, 802 L21