A wide-field telescope for MACHO searching at dome-C

Roberto Ragazzoni*, Giuseppe Bono, Piero Salinari, Carmelo Arcidiacono, Maurizio Busso, Emiliano Diolaiti, Jacopo Farinato, Anna Moore, Armando Riccardi, Marco Roncatelli, Giorgio Sartori, Roberto Soci, Gino Tosti, Elise Vernet

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Wide-Field imaging at visible wavelengths with seeing of the order of 0.1-0.2arcsec is believed to be possible from the high Antarctic plateau site of Dome-C by the removal of ground layer effects only. We present a proposal for a 2m-class telescope specifically designed for the science case of short duration (~10s or greater) microlensing events in the crowded central regions of Galactic Globular Clusters and nearby galaxies where the achievement of a spatial resolution of the order of a fraction of arcsec is essential. The philosophy behind the telescope proposal is discussed in detail. It is emphasized that this is a project with a specific unique science goal in mind and not a large scale facility instrument. A preliminary design for the optics, ground layer removal using a deformable secondary and "static" wavefront sensor and telescope structure is presented. In particular, it is shown that substantial simplification in the design can be achieved by having a specific science goal in mind, so reducing the complexity and increasing reliability. Transport and logistics for the successful deployment and operation of the telescope at the Dome-C site are discussed.

Original languageEnglish
Pages (from-to)481-490
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5489
Issue numberPART 1
DOIs
Publication statusPublished - 2004
Externally publishedYes
EventGround-based Telescopes - Glasgow, United Kingdom
Duration: 21 Jun 200425 Jun 2004

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