A Caltech Library Service

The 4m International Liquid Mirror Telescope (ILMT)

Surdej, J. and Mawet, D. (2006) The 4m International Liquid Mirror Telescope (ILMT). In: Ground-based and Airborne Telescopes. Proceedings of SPIE. No.6267. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 626704. ISBN 0-8194-6332-9.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription DOIArticle
Surdej, J.0000-0002-7005-1976
Mawet, D.0000-0002-8895-4735
Additional Information:© 2006 SPIE. The ILMT project is supported by contract IUAP P5/36 “Pôle d’Attraction Interuniversitaire”, by the “Communauté Française” and the “Région Wallonne de Belgique”, by the “Fonds National de la Recherche Scientifique” and the “Liège University”, Belgium.
Funding AgencyGrant Number
Pôle d’Attraction Inter-UniversitaireUNSPECIFIED
Communauté française de Belgique – Actions de recherche concertéesUNSPECIFIED
Région Wallonne de BelgiqueUNSPECIFIED
Fonds National de la Recherche Scientifique (Belgium)UNSPECIFIED
Liège UniversityUNSPECIFIED
Subject Keywords:liquid mirror telescope, CCD camera, gravitational lensing
Series Name:Proceedings of SPIE
Issue or Number:6267
Record Number:CaltechAUTHORS:20150526-143552401
Persistent URL:
Official Citation: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; The 4m international liquid mirror telescope (ILMT). Proc. SPIE 6267, Ground-based and Airborne Telescopes, 626704 (June 27, 2006); doi:10.1117/12.671695
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57825
Deposited By: Tony Diaz
Deposited On:27 May 2015 18:49
Last Modified:10 Nov 2021 21:55

Repository Staff Only: item control page