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Calibrating 15 years of GOLF data

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arxiv 1110.0396 v1 pith:2L45OFZR submitted 2011-10-03 astro-ph.SR

classification astro-ph.SR
keywords datagolfhighinstrumentalveryyearsaboardageing
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The GOLF resonant scattering spectrophotometer aboard SoHO has now provided 15 years of continuous high precision Sun-as-a-star radial-velocity measurements. This length of time series provides very high resolution in the frequency domain and is combined with very good long-term instrumental stability. These are the requirements for measuring the low-l low-frequency global oscillations of the Sun that will unlock the secrets of the solar core. However, before the scientifically interesting gravity and mixed modes of oscillation fully reveal themselves, a correction and calibration of the whole data set is required. Here we present work towards producing a 15 year GOLF data set corrected for instrumental ageing and thermal variation.

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