Based on observations collected at the Loiano Observatory, operated by the Istituto Nazionale di Astrofisica (INAF), and at the Centro Astronomico Hispano Aleman (CAHA) at Calar Alto, operated jointly by the Max-Planck Institut für Astronomie and the Instituto de Astrofisica de Andalucia (CSIC). Partially based on data obtained at the Paranal Observatory of the European Southern Observatory for programmes 165.H-0588 and 167.D-0407.

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Nonradial oscillations were recently detected in GD 133 from time-series photometry performed in May 2005.

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...1999)

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... BFOSC

Bologna Faint Object Spectrograph & Camera, see http://www.bo.astro.it/loiano/ for more details.

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... IRAF

Image Reduction and Analysis Facility, written and supported by the IRAF programming group at the National Optical Astronomy Observatories (NOAO) in Tucson, Arizona (http://iraf.noao.edu/).

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... (969.0 s)

The amplitude of this mode, however, is not the highest following the results of the sinusoidal fits, as reported in Table 1.

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