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Proceedings Paper

The 4m international liquid mirror telescope (ILMT)
Author(s): J. Surdej; O. Absil; P. Bartczak; E. Borra; J.-P. Chisogne; J.-F. Claeskens; B. Collin; M. De Becker; D. Defrère; S. Denis; C. Flebus; O. Garcet; P. Gloesener; C. Jean; P. Lampens; C. Libbrecht; A. Magette; J. Manfroid; D. Mawet; Th. Nakos; N. Ninane; J. Poels; A. Pospieszalska; P. Riaud; P.-G. Sprimont; J.-P. Swings
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Paper Abstract

The entire funding has recently been obtained in Belgium for the construction of a 4m Liquid Mirror Telescope. Its prime focus will be equipped with a semi-conventional glass corrector allowing to correct for the TDI effect and a thinned, high quantum efficiency, 4K × 4K pixel equivalent CCD camera. It will be capable of subarcsecond imaging in the i'(760 nm) and possibly r', g' band(s) over a field of ~ 30' in diameter. This facility will be entirely dedicated to a deep photometric and astrometric variability survey over a period of ~ 5 years. In this paper, the working principle of liquid mirror telescopes is first recalled, along with the advantages and disadvantages of the latter over classical telescopes. Several science cases are described. For a good access to one of the galactic poles, the best image quality sites for the ILMT are located either in Northern Chile (latitude near -29°30') or in North-East India (Nainital Hills, latitude near +29°30'). At those geographic latitudes, a deep (i' = 22.5 mag.) survey will approximately cover 90 square degrees at high galactic latitude, which is very useful for gravitational lensing studies as well as for the identification of various classes of interesting galactic and extragalactic objects (cf. microlensed stars, supernovae, clusters, etc.). A description of the telescope, its instrumentation and the handling of the data is also presented.

Paper Details

Date Published: 27 June 2006
PDF: 10 pages
Proc. SPIE 6267, Ground-based and Airborne Telescopes, 626704 (27 June 2006); doi: 10.1117/12.671695
Show Author Affiliations
J. Surdej, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
O. Absil, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
P. Bartczak, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
E. Borra, Laval Univ. (Canada)
J.-P. Chisogne, Advanced Mechanical and Optical Systems (Belgium)
J.-F. Claeskens, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
B. Collin, Advanced Mechanical and Optical Systems (Belgium)
M. De Becker, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
D. Defrère, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
S. Denis, Advanced Mechanical and Optical Systems (Belgium)
C. Flebus, Advanced Mechanical and Optical Systems (Belgium)
O. Garcet, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
P. Gloesener, Advanced Mechanical and Optical Systems (Belgium)
C. Jean, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
P. Lampens, Royal Observatory of Belgium (Belgium)
C. Libbrecht, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
A. Magette, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
J. Manfroid, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
D. Mawet, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
Th. Nakos, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
N. Ninane, Ctr. Spatial de Liège, Liège Univ. (Belgium)
J. Poels, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
A. Pospieszalska, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
P. Riaud, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
P.-G. Sprimont, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)
J.-P. Swings, Institut d'Astrophysique et de Géophysique, Liège Univ. (Belgium)


Published in SPIE Proceedings Vol. 6267:
Ground-based and Airborne Telescopes
Larry M. Stepp, Editor(s)

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