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        The Taiwan-American occultation survey project stellar variability. I : Detection of low-amplitude δ Scuti stars

        Author
        Kim, D. -W.
        Protopapas, P.
        Alcock, C.
        Wright, N.J.
        Bianco, F.B.
        Lehner, M.J.
        Dave, R.
        Byun, Y.-I.
        Kyeong, J.
        Lee, B.-C.
        Axelrod, T.
        Chen, W.-P.
        Lin, H.-C.
        Wang, J.-H.
        Zhang, Z.-W.
        Coehlo, N.K.
        Rice, J.A.
        Cook, K.H.
        Marshall, S.L.
        King, S.-K.
        Lee, T.
        Wang, S.-Y.
        Wen, C.-Y.
        Porrata, R.
        Schwamb, M.E.
        Attention
        2299/10085
        Abstract
        We analyzed data accumulated during 2005 and 2006 by the Taiwan-American Occultation Survey (TAOS) in order to detect short-period variable stars (periods of ≲1 hr) such as δ Scuti. TAOS is designed for the detection of stellar occultation by small-size Kuiper Belt Objects and is operating four 50 cm telescopes at an effective cadence of 5 Hz. The four telescopes simultaneously monitor the same patch of the sky in order to reduce false positives. To detect short-period variables, we used the fast Fourier transform algorithm (FFT) in as much as the data points in TAOS light curves are evenly spaced. Using FFT, we found 41 short-period variables with amplitudes smaller than a few hundredths of a magnitude and periods of about an hour, which suggest that they are low-amplitude δ Scuti stars. The light curves of TAOS δ Scuti stars are accessible online at the Time Series Center Web site (http://timemachine.iic.harvard.edu).
        Publication date
        2010-01-01
        Published in
        The Astronomical Journal
        Published version
        https://doi.org/10.1088/0004-6256/139/2/757
        Other links
        http://hdl.handle.net/2299/10085
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