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Título:
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MEGARA MOS: where are my positioners and fibers pointing to?
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Autores:
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Pérez Calpena, Ana ;
Sánchez-Blanco Mancera, Ernesto ;
Gómez Álvarez, Pedro ;
Martínez Delgado, Ismael ;
Castillo Morales, África ;
Gil de Paz, Armando ;
Arrillaga, Xabier, Xabier ;
García Vargas, Marisa Luisa ;
Gallego Maestro, Jesús ;
Carrasco Licea, Esperanza ;
Iglesias Páramo, Jorge;, Jorge ;
Cedazo, Raquel
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Tipo de documento:
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texto impreso
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Editorial:
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Spie-Int Soc Optical Engineering, 2018
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Astrofísica
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Materia = Ciencias: Física: Astronomía
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Tipo = Artículo
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Resumen:
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MEGARA is an integral-field and multi-object medium-resolution spectrograph for the GTC 10.4m telescope, which was commissioned on June - August 2017. MEGARA offers two observing modes, the LCB mode, a large central IFU; and a Multi-Object Spectrograph (MOS) mode, composed by 92 robotic positioners carrying 7-fiber minibundles each. This paper presents the models and measurements developed for the alignment between the image of the telescope pupil and the 100-itm fiber cores during the integration and verification at the laboratory. On the one hand, the error in the positioner-minibundles assembly was optimized with the aim of achieving a fiber-to-fiber flux homogeneity better than 10%. On the other hand, the positioner pointing was characterized in order to achieve a pointing precision of 1/5 of the spaxel size (which has been designed to be 0.62 arcsec). The on-sky measurements obtained during the commissioning to verify our laboratory results are also presented.
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En línea:
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https://eprints.ucm.es/50820/1/jesusgallego139libre.pdf
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