Coronal magnetograms of solar active regions

A series of coronal magnetograms, related to the active region NOAA 9068 is derived using the effects of the quasi-transverse (QT-) propagation at microwaves. In the assumption that the product of the electron density N and the scale of magnetic divergence L_d is constant and equal to 10^{18} cm^{-2}, the sensitivity of the measurements peaks at B(G) approx 180 λ^{-4/3} (cm), where λ is the observational wavelength. The radio maps of the Sun taken with the Solar Siberian Radio Telescope (SSRT) at λ = 5.2 cm were sampled and converted into the 2D coronal magnetograms supplying absolute values of the total magnetic vector ěc B in the range 10-30 G. Each coronal magnetogram covers the portion of the microwave source in the active region affected by the QT-propagation conditions in the corona.