Examinando por Autor "Barrera, S."

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    EMIR, the GTC NIR multiobject imager-spectrograph
    (2007-01-01) Garzón, F.; Abreu, D.; Barrera, S.; Becerril, S.; Cairós, L.M.; Díaz, J.J.; Fragoso-López, A.B.; Gago, F.; Grange, R.; González, C.; López, P.; Patrón, J.; Pérez, J.; Rasilla, J.L.; Redondo, P.; Restrepo, R.; Saavedra, P.; Sánchez, V.; Tenegi, F.; Vallbé, M.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    Espectrógrafo Multi-objecto InfraRojo (EMIR), currently entering into its fabrication and AIV phase, will be one of the first common user instruments for the GTC, the 10 m telescope under construction by GRANTECAN at the Roque de los Muchachos Observatory (Canary Islands, Spain). EMIR is being built by a Consortium of Spanish and French institutes led by the Instituto de Astrofísica de Canarias (IAC). EMIR is designed to realize one of the central goals of 10 m class telescopes, allowing observers to obtain spectra for large numbers of faint sources in an time-efficient manner. EMIR is primarily designed to be operated as a MOS in the K band, but offers a wide range of observing modes, including imaging and spectroscopy, both long slit and multiobject, in the wavelength range 0.9-2.5 µm. It is equipped with two innovative subsystems: a robotic reconfigurable multislits mask and dispersive elements formed by the combination of high quality diffraction grating and conventional prisms, both at the heart of the instrument. The present status of development, expected performances, schedule, and plans for scientific exploitation are described and discussed. The development and fabrication of EMIR is funded by GRANTECAN and the Plan Nacional de Astronomía y Astrofísica (National Plan for Astronomy and Astrophysics, Spain). © 2007 Springer.
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    EMIR: The GTC NIR multi-object imager-spectrograph
    (SPIE-INT SOC OPTICAL ENGINEERING, 2006-01-01) Garzón, F.; Abreu, D.; Barrera, S.; Becerril, S.; Cairós, L.M.; Díaz, J.J.; Fragoso, A.B.; Gago, F.; Grange, R.; González, C.; López, P.; Patrón, J.; Pérez, J.; Rasilla, J.L.; Redondo, P.; Restrepo, R.; Saavedra, P.; Sánchez, V.; Tenegi, F.; Vallbé, M.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    EMIR, currently entering into its fabrication and AIV phase, will be one of the first common user instruments for the GTC, the 10 meter telescope under construction by GRANTECAN at the Roque de los Muchachos Observatory (Canary Islands, Spain). EMIR is being built by a Consortium of Spanish and French institutes led by the Institute de Astrofisica de Canarias (IAC). EMIR is designed to realize one of the central goals of 10m class telescopes, allowing observers to obtain spectra for large numbers of faint sources in an time-efficient manner. EMIR is primarily designed to be operated as a MOS in the K band, but offers a wide range of observing modes, including imaging and spectroscopy, both long slit and multiobject, in the wavelength range 0.9 to 2. 5 µm. It is equipped with two innovative subsystems: a robotic reconfigurable multislit mask and disperssive elements formed by the combination of high quality difracction grating and conventional prisms, both at the heart of the instrument. The present status of development, expected performances, schedule and plans for scientific exploitation are described and discussed. The development and fabrication of EMIR is funded by GRANTECAN and the Plan Nacional de Astronomia y Astrofisica (National Plan for Astronomy and Astrophysics, Spain).
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    Status of the EMIR mechanical system
    (SPIE-INT SOC OPTICAL ENGINEERING, 2006-06-28) Sánchez, V.; Barrera, S.; Becerril, S.; Correa, S.; Pérez, J.; Redondo, P.; Restrepo, R.; Saavedra, P.; Tenegi, F.; Patrón, J.; Garzón, F.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    EMIR is the NIR multi-object imager and spectrograph for the GTC (Gran Telescopic Canarias). The instrument ADR (Advanced Design Review) was held successfully in March 2006. During the AD phase, a number of mechanical concepts were tested on development prototypes to ensure the feasibility of the PDR proposed designs. This presentation contains an overview of the current mechanical status of the instrument, as well as the prototypes development. It contains the prototype tests results of the collimator first lens barrel, the support trusses, the grisms wheel and the demonstration programme for the cryogenic reconfigurable slit mechanism.
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    Test results. EMIR optomechanics
    (SPIE-INT SOC OPTICAL ENGINEERING, 2005-08-30) Barrera, S.; González, C.; Manescau, A.; Abreu, D.; Becerril, S.; Correa, S.; Fragoso, A.; Pérez, J.; Redondo, P.; Restrepo, R.; Saavedra, P.; Sánchez, V.; Tenegi, F.; Garzón, F.; Patrón, J.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    EMIR is a NIR multiobject spectrograph with imaging capabilities to be used at the GTC. The first collimator lens in EMIR, made of Fused Silica, has an outer diameter of 490 mm, and a weight of 265 N, which make it one of the largest Fused Silica lenses ever mounted to work under cryogenic conditions. The results of the various tests being done at the IAC (with two different lens dummies) in order to validate a mounting design concept for this lens, are presented here. The radial support concept tested consists of three contact areas around the lens, one of which is a PTFE block, preloaded by coil springs and the other two are fixed supports made of Aluminum and PTFE, dimensioned in order to keep lens centered both at room temperature and under operation conditions.