Volume 398, Number 1, January IV 2003
|Page(s)||305 - 314|
|Published online||14 January 2003|
On the measurement bias of low- solar -mode excitation parameters: The impact of a ground-based window function
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
2 School of Science & Mathematics, Sheffield Hallam University, Sheffield S1 1WB, UK
3 Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France
Corresponding author: W. J. Chaplin, email@example.com
Accepted: 6 November 2002
We present a study of the impact of a ground-based, multi-station window function on estimates of the power and damping of low- solar p modes extracted from fits to resonant structure in the frequency domain. The window functions come from six-site observations made by the Birmingham Solar-Oscillations Network (BiSON) over the 10-yr period beginning 1991 January. Two strategies were adopted. In the first, we used an 800-d time series of continuous observations made by the GOLF instrument on board the ESA/NASA SOHO satellite. These data were modulated by a variety of BiSON window functions, with fractional duty cycles ranging from ~0.4 to ~0.8, and the resulting series analyzed. In the second we generated artificial 10-yr time series and studied the effect on these of the complete BiSON window.
Key words: methods: data analysis / Sun: oscillations
© ESO, 2003
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