Fig. 1.

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Temperature response, or contribution, function R(T, n). The red line shows the response for the EUI channel at 174 Å, and the blue line corresponds to the one for AIA at 171 Å. Both responses are shown here for a density of n = 109 cm−3, which is typical for coronal loops. The radiative losses (per volume) in the respective band are given by n2R. See Sect. 2.2.

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