The temporal spectrum of the sdB pulsating star HS 2201+2610 at 2 ms resolution

In this article we present the results of more than 180 hours of time-series photometry on the low gravity (log g = 5.4, T e f f = 29 300 K, log He/H = -3.0 by number) sdB pulsating star HS 2201+2610, obtained between September 2000 and August 2001. The temporal spectrum is resolved and shows 5 close frequencies: three main signals at 2860.94, 2824.10 and 2880.69 μHz, with amplitudes of about 1%, 0.5% and 0.1% respectively, are detected from single run observations; two further peaks with very low amplitude (