Statistics – Computation
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apl%26c..27..237p&link_type=abstract
Astrophysical Letters and Communications (ISSN 0888-6512), vol. 27, no. 4, 1988, p. 237-240. Research supported by the Australia
Statistics
Computation
1
Computational Astrophysics, Fast Fourier Transformations, Gamma Ray Astronomy, X Ray Astronomy, Cerenkov Radiation, Data Processing, Data Reduction, Supernova 1987A
Scientific paper
X-ray and gamma-ray astronomy sometimes requires a period search in data taken over intervals of hours or days for all periods down to about 1 ms. Such data constitute a time series of enormous length and FFT cannot be used directly because the time series exceeds the memory capacity of existing computers. The number of events is, however, very much less than the length of the time series, and the event times can fit into computer memory. Therefore the usual approach is to calculate separately the value of some circular statistic at each period of interest. However, it is usually not possible to search all the periods because of the large computing time required. The application of a segmented FFT algorithm to period searches in X-ray and gamma-ray astronomy is discussed.
Hocking Wayne K.
Protheroe Raymond J.
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