Sunday, May 4, 2025

Sunspot AR4079 in white light and Barium Ion line

 On May 1 and 2 I was able to image the big sunspot AR4079. One image was made using white light (OIII, IR/UV cut), the other one in Barium II D2 line using my Sol'Ex.





The structure in BaII D2 is clearly visible. The image is not that sharp as this is a crop from an entire sundisk.