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



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Gil de Paz, Armando and Gallego Maestro, Jesús and Bouquin, A. and Carbajo, J. and Cardiel López, Nicolás and Castillo Morales, África and Esteban San Román, Segundo and López Orozco, José Antonio and Pascual, S. and Picazo, P. and Sánchez Penim, Ainhoa and Velázquez, M. and Zamorano Calvo, Jaime and Catalán Torrecilla, Cristina and Dullo, Bililign and Pérez González, P.G. and Roca Fábrega, Santi (2018) MEGARA, the R=6000-20000 IFU and MOS of GTC. Ground-based and airborne instrumentation for astronomy, 10702 . ISSN 0277-786X

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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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© 2018 SPIE. Artículo firmado por 84 autores. Conference on Ground-Based and Airborne Instrumentation for Astronomy (VII. 2018. Austin, TX, USA).

Uncontrolled Keywords:Instrumentation; Spectrigraohs; Tecniques; Spectroscopic.
Subjects:Sciences > Physics > Astrophysics
ID Code:51261
Deposited On:03 Apr 2019 10:55
Last Modified:03 Apr 2019 10:55

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