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So we carried
out a modeling. This modeling is much more demanding than the previous one,
because under weak p-a diffusion, we have to track down all the pitch angle
drift, diffusion and variation along the inhomogeneous magnetic loop. I
figure that because of the pa variation within a magnetic loop with field
str. Variation it also depends on the magnetic field variation. We put a
specific magnetic field variation of the loop being observed. And then
electron evolution in phase space is obtained and used for calculation of the microwave flux at the two observing
frequencies. For a systematic search, we , 2. the spectral index variation. This is the first time to tell the time delay
due to pitch angle diffusion in addition to the energy space diffusion, and
this will later be found to be the key to explaining the observation.
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