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Series of photometric sum indices derived from RPS Ca II K (left) and RPS red continuum (right) observations which were processed with our method (1st row) and the methods by Walton et al. (1998, 2nd row), Worden et al. (1998, 3rd row), and Puiu (2019, 4th row). Daily values are shown in black, while 180-day running averages are shown in red. The dashed blue horizontal line denotes the 0-level of photometric sum.
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