Cb_t13 = 1.301325996315766e-21 
Ct_t13 = 7.625254871181098e-22*1.01

data = loadtxt('./gate_map_B_0T_t1_3_1p29degrees.txt')
Vbg = data[0, 1:]
Vtg = data[1:, 0]
Rxx = data[1:, 1:]