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A&A Supplement Series, Vol. 125, October I 1997, 195-205

Received December 13, 1996; accepted January 2, 1997

Techniques used in the analysis of data collected by the Birmingham Solar-Oscillations Network (BiSON)

II. Frequency domain analysis & data merging

W.J. Chaplin,tex2html_wrap1084 Y. Elsworth,tex2html_wrap1084 R. Howetex2html_wrap1088, G.R. Isaak,tex2html_wrap1084 C.P. McLeod,tex2html_wrap1084 B.A. Miller,tex2html_wrap1084 - R. Newtex2html_wrap1096

Send offprint request: W.J. Chaplin

tex2html_wrap1098  School of Physics and Space Research, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
tex2html_wrap1100  Now at: Queen Mary & Westfield College, University of London, Mile End Road, London, London E1 4NS, UK
tex2html_wrap1102  School of Science & Mathematics, Sheffield Hallam University, Sheffield S1 1WB, UK


The Birmingham Solar-Oscillations Network (BiSON) consists of 6 solar observatories dedicated to the collection of full-disc solar Doppler velocity data - these data are sensitive to the lowest spatial degrees of oscillation (tex2html_wrap_inline1072). In Paper I of this series, we described the calibration of raw data from the BiSON instruments to produce solar velocity residuals representing the oscillations of the Sun's surface. In this paper, we discuss the combination of velocity residuals into time series - including a thorough discussion of the treatment of data overlaps between sites - and the analysis of the power spectra computed from such time series to derive the characteristics of the acoustic modes.

keywords: Sun: oscillations -- methods: data analysis

Copyright by the European Southern Observatory (ESO)