𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The Swiss Federal Observatory, Zürich

✍ Scribed by M. Waldmeier

Publisher
Springer
Year
1968
Tongue
English
Weight
562 KB
Volume
5
Category
Article
ISSN
0038-0938

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✦ Synopsis

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-screen at the lower focus, Ha-filter (Halle) and cine-camera at the upper focus.

K-coronameter (polarimeter). Auxiliary apparatus: several recording micro-densitometers, two-dimensional recording-photometer, isophote-recorder.

Arosa :

Large coronograph, 200/2250 ram, with photoelectric guiding and Littrow-type spectrograph, 130/1500mm; dispersion 5/~/mm. In addition the instrument is equipped with a 2 ~ birefringent filter for the line 5303/~.

Small coronograph, 120/1500 ram, with direct-vision-spectroscope.

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