Navegando por Palavras-chave "Doppler shift"

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    SEARCH for MONOCHROMATIC SIGNALS USING DATA FROM the ALLEGRO GRAVITATIONAL WAVE DETECTOR
    (World Scientific Publ Co Pte Ltd, 2010-08-01) Oliveira, F. G.; Marinho, R. M.; Pires, R.; Xavier, V. S.; Frajuca, C.; Magalhaes, N. S. [UNIFESP]; Aguiar, O. D.; Technol Inst Aeronaut; Fed Inst Educ Sci & Technol São Paulo; Universidade Federal de São Paulo (UNIFESP); Natl Inst Space Res
    We present a data analysis method for searching monochromatic signals in temporal series. With this method it is possible to estimate the power spectrum by using averaged modified periodograms which reinforce the presence of peaks due to monochromatic signals. in particular we use ALLEGRO's gravitational wave data for the year 1999 taking into account the effect due to the orbital motion of the Earth. We tested the method injecting a simulated signal in real data and we were able to detect it. Then we seeked for candidate signals within the noise but nothing was found. the method showed useful for applications in the search for continuous gravitational waves.