Fig. 5
Periodogram comparing the different central wavelength ranges of Hα for BD+61 195. The pEW A1 is designated by the black line, the core pEW A2 is in green/dotted, the pEW with broad central wavelength range A3 is in cyan/dashed, and the pEW with variable width A4 is in red/dot-dashed. The horizontal blue lines show the FAP levels of 0.1 (dash-dotted), 0.05 (dashed), and 0.01 (solid).
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