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Instruments for a E...
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Russell, Adrian P.
(author)
Instruments for a European Extremely Large Telescope: the challenges of designing instruments for 30- to 100-m telescopes
- Article/chapterEnglish2004
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LIBRIS-ID:oai:lup.lub.lu.se:f904cee4-902e-4d8c-b162-d56f2fb1b2a9
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https://lup.lub.lu.se/record/528468URI
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https://doi.org/10.1117/12.551473DOI
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Language:English
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Summary in:English
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Designs for Extremely Large Telescopes (ELTs) are quite well advanced,but the requirements of instruments have had limited impact. Sinceprovision of a suitable environment for instruments is a critical aspectof all telescopes, we outline some well-known and some less-appreciatedchallenges of designing instruments for ELTs. A wide-field spectrometer(WFSPEC) with ~10 arcmin field-of-view, probably with AO correction ofground-layer seeing, illustrates the well-known difficulty of matchingmodern detector pixels to large (~0."3) images. The challenges ofexploiting wide-field (1'-2' FOV) high-performance AO systems on ELTsare illustrated by a Multi-Object Multi-field Spectrometer and Imager(MOMSI), which provides imaging and integral-field spectroscopy, atnear-diffraction-limited pixel scales, of targets in approximately 300subfields each. This instrument, roughly equivalent to all theastronomical spectrometers yet built, extracts ~200 times less of theavailable information from the ELT's FOV than near-future instruments on8-m class telescopes will do for their hosts. We emphasise the greatsize of such instruments (40-100 tonnes, 100-200 m3) and the need toaccommodate this size in telescope plans. A third area of challenge isthe exploitation of the potential capabilities of ELTs in the mid-IR,where they would offer powerful complements to JWST and ALMA;low-emissivity telescope designs and, possibly, cryogenic AO, may beneeded. Finally, we outline the potential challenges of correctingatmospheric dispersion effects.
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Monnet, Guy
(author)
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Quirrenbach, Andreas
(author)
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Bacon, Roland
(author)
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Redfern, Michael
(author)
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Andersen, TorbenLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-tan
(author)
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Ardeberg, ArneLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-aar
(author)
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Atad-Ettedgui, Eli
(author)
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Hawarden, Timothy G.
(author)
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Moorwood, Alan F. M.
(editor)
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Iye, Masanori
(editor)
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Astronomi - Genomgår omorganisationInstitutionen för astronomi och teoretisk fysik - Genomgår omorganisation
(creator_code:org_t)
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In:Ground-based instrumentation for astronomy (Proceedings of the SPIE): SPIE5492, s. 1796-18090819454249
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