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Two simple image slicers for high resolution spectroscopy

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Abstract

We present the design, manufacturing, test and performance of two image slicers for high resolution spectroscopy. Based on the classical Bowen-Walraven concept, our slicers allow to make two slices of the image of the input fibre. We introduce the idea of a second fibre that can be cropped in half to reach the same width of the science target fibre and that can be used for simultaneous wavelength reference. The slicers presented are mirror and prism based, respectively. Both devices work within expectation, showing differences mainly in their efficiency. The prism based slicer is the solution that was adopted for the FIDEOS spectrograph, an instrument built by the AIUC for the ESO 1m telescope of La Silla. Test spectra obtained with this instrument are included as examples of a real application of the device.

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Acknowledgments

This work was supported by CONICYT project Fondecyt n. 1130849 and CONICYT project Anillo ACT-1417. We thank the Institute of Physics and Department of Mechanics and Metallurgy of Pontificia Universidad Católica de Chile for their significant contribution to the manufacturing of the mirror slicer, in particular to Donovan Díaz, Susana Rojas, Luis Valdés, and Ignacio Lagos.

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Authors and Affiliations

  1. Center of Astro Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile

    M. Tala

  2. Department of Electrical Engineering and Center of Astro Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile

    L. Vanzi & A. Zapata

  3. European Southern Observatory, Garching, Germany

    G. Avila & C. Guirao

  4. Pecchioli Research S.R.L., Firenze, Italy

    E. Pecchioli & F. Pieralli

  5. Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Heidelberg, Germany

    M. Tala

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  1. M. Tala
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  2. L. Vanzi
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  3. G. Avila
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  4. C. Guirao
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  5. E. Pecchioli
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  6. A. Zapata
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  7. F. Pieralli
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Correspondence to M. Tala.

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Tala, M., Vanzi, L., Avila, G. et al. Two simple image slicers for high resolution spectroscopy. Exp Astron 43, 167–176 (2017). https://doi.org/10.1007/s10686-017-9526-5

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  • DOI: https://doi.org/10.1007/s10686-017-9526-5

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