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On February 15th, XRT observed this small Coronal Mass Ejection (CME) on the east limb. The XRT filter on the left is sensitive to plasma around 8 million Kelvin (14 million degrees Fahrenheit), while the 171 Å AIA filter in the right animation sees material under 1 million Kelvin. Notice how the AIA/171 images don't show the CME material at all because the plasma is too hot to be seen through that filter, but we can still see the effects of the CME plowing through cooler plasma that does show up. (This is just like our previous edition, which showed a coronal cavity at several different wavelengths.) A LASCO coronagraph movie of this event can be found here, following a larger event that happened to the north.
Keywords: CME, Limb, Temperature Structure
Filters: Be_thin, AIA/171