Pulsation Period Stability in the SDBV Star HS 2201+2610
The stability of the pulsation periods of the sdB pulsator HS 2201+2610 is analyzed after 15 months of photometric monitoring. Although the time basis is not long enough to obtain a measurement of P, an upper limit of about 4×10-12 (in absolute value) is derived for the variation of the main pulsation period in time.
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