Long-Term Observations of Solar Active Regions at the VNT

J A Bonet,Roberto Casas,C Giammanco,Valentin Martinez Pillet,Asa Bradman

ESA SPECIAL PUBLICATIONS（2000）

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摘要

A long-term programme of observations at the Vacuum Newton Telescope is described. It consist of two main parts: 1) full-disc observations in six different filters to determine the different contributions of magnetic structures (sunspots, plages and network) to the solar irradiance fluctuations and 2) a study of the variation of the IR contrast of sunspots with the solar cycle.

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关键词

solar active regions,observations,long-term

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