MEGARA, the R=6000-20000 IFU and MOS of GTC

MEGARA is the new generation IFU and MOS optical spectrograph built for the 10.4m Gran Telescopio CANARIAS (GTC). The project was developed by a consortium led by UCM (Spain) that also includes INAOE (Mexico), IAA-CSIC (Spain) and UPM (Spain). The instrument arrived to GTC on March 28th 2017 and was...

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Detalles Bibliográficos
Autores: Gil De Paz, Armando, Gallego Maestro, Jesús, Bouquin, A., Carbajo, J., Cardiel López, Nicolás, Castillo Morales, María África, Esteban San Román, Segundo, López Orozco, José Antonio, Pascual Ramírez, Sergio, Picazo, P., Sánchez Penim, Ainhoa, Velázquez, M., Zamorano Calvo, Jaime, Catalán Torrecilla, Cristina, Dullo, Bililign, Pérez González, Pablo Guillermo, Roca Fábrega, Santi
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/18724
Acceso en línea:https://hdl.handle.net/20.500.14352/18724
Access Level:acceso abierto
Palabra clave:52
Instrumentation
Spectrigraohs
Tecniques
Spectroscopic.
Astrofísica
Descripción
Sumario:MEGARA is the new generation IFU and MOS optical spectrograph built for the 10.4m Gran Telescopio CANARIAS (GTC). The project was developed by a consortium led by UCM (Spain) that also includes INAOE (Mexico), IAA-CSIC (Spain) and UPM (Spain). The instrument arrived to GTC on March 28th 2017 and was successfully integrated and commissioned at the telescope from May to August 2017. During the on-sky commissioning we demonstrated that MEGARA is a powerful and robust instrument that provides on-sky intermediate-to-high spectral resolutions R_(FWHM) ~ 6,000, 12,000 and 20,000 at an unprecedented efficiency for these resolving powers in both its IFU and MOS modes. The IFU covers 12.5 x 11.3 arcsec2 while the MOS mode allows observing up to 92 objects in a region of 3.5 x 3.5 arcmin^(2) . In this paper we describe the instrument main subsystems, including the Folded-Cassegrain unit, the fiber link, the spectrograph, the cryostat, the detector and the control subsystems, and its performance numbers obtained during commissioning where the fulfillment of the instrument requirements is demonstrated.

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