TESS and AAVSO observations show that V338 Boo's first overtone pulsation disappears for a few days in 2022, reappears, and later becomes dominant, suggesting periodic mode switching.
E., Phillip , C., Fleming , S
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Caught in the Act: Observations of the Double-mode RR Lyrae V338 Boo During the Disappearance of a Pulsation Mode
TESS and AAVSO observations show that V338 Boo's first overtone pulsation disappears for a few days in 2022, reappears, and later becomes dominant, suggesting periodic mode switching.