Multi-height observations of magnetoacoustic cut-off frequency in a sunspot atmosphere

Ding Yuan, R. Sych, V. E. Reznikova +1

We used the Pixelised Wavelet Filtering (PWF) method to compute narrow-band power maps of SDO/AIA imaging datasets in the 1700 Å, 1600 Å and 304 Å bandpasses that correspond to dif…