Abstract
This paper describes a real-time spectrum analyser with on-line definition of the confidence levels built at Trieste Observatory for a research program on periodical components of unknown period in optical sources. The system is realized by a photon counting photometer on-line to a computer that elaborates in real-time the data from the photometer and displays the spectrum of the source measured. The spectrum is normalized to unity mean value and the display is calibrated by the confidence levels relative to the\(\chi _v^2 \) distribution of the spectrum displayed. Some experimental data show the performance of the machine that operates in real-time at full efficiency up to 160 Hz.
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References
Cooley, J. W., Lewis, P. A. W., and Welch, P. D.: 1967,IBM Research RC 1743.
Jenkins, G. M. and Watts, D. G.: 1968,Spectral Analysis and its Applications, Holden Day Publ. Inc., New York.
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Work supported by Consiglio Nazionale delle Ricerche, Gruppo Nazionale di Astronomia, Settore Tecnologie Astronomiche. Trieste Observatory — Instruments and Data Processing Group (1/76).
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Santin, P., Sedmak, G. A real-time spectrum analyser with on-line definition of the confidence levels. Astrophys Space Sci 48, 57–63 (1977). https://doi.org/10.1007/BF00643039
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DOI: https://doi.org/10.1007/BF00643039