The Swiss Federal Observatory, Zürich
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M. Waldmeier
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Article
📅
1968
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Springer
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English
⚖ 562 KB
Tower telescope, 300 mm coelostat, objective 250/11000 mm, white light camera, direct-vision-spectroscope, Ha-filter (Halle), K-filter (Halle). Vertical telescope, 120 mm coelostat, objective 80/5000 ram, spectrohelioscope. Coud6-refractor, 150/2250 ram, with photoelectric guiding. Projection-scree