| Autor: |
Andreas Kelz, Thomas Liebner, Max Funck, Svend M. Bauer, Roland Winkler, Nicolas Azais, Swara Rahurkar, Ulrike Lemke, Samuel C. Barden |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Ground-based and Airborne Instrumentation for Astronomy VIII. |
| DOI: |
10.1117/12.2562381 |
| Popis: |
The 4-meter Multi-Object Spectroscopic Telescope (4MOST), wide-field, high-multiplex spectroscopic survey facility will enable the simultaneous spectroscopy of up to 2400 targets within a 2.5° diameter field of view. A secondary guider system optical relay and data production description is described. The role of this guider is for fine rotational and target alignment corrections. The output of the 12 times 7 fibres are arranged such that the CCD detector can be read out in continuous read mode. The position of all fibres are illuminated at their spectrograph end and measured using a camera system at the positioner end. For the secondary guide bundles, only the central fibre is illuminated. A notch filter is used in the image relay in such a way that that the back illumination light is reflected from back illumination fibres to illuminate only the central fibres of each guide probe. This allows on-sky guiding while the fibres are being positioned. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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