RT Journal Article
T1 MEGARA, the R=6000-20000 IFU and MOS of GTC
A1 Gil de Paz, Armando
A1 Gallego Maestro, Jesús
A1 Bouquin, A.
A1 Carbajo, J.
A1 Cardiel López, Nicolás
A1 Castillo Morales, África
A1 Esteban San Román, Segundo
A1 López Orozco, José Antonio
A1 Pascual, S.
A1 Picazo, P.
A1 Sánchez Penim, Ainhoa
A1 Velázquez, M.
A1 Zamorano Calvo, Jaime
A1 Catalán Torrecilla, Cristina
A1 Dullo, Bililign
A1 Pérez González, P.G.
A1 Roca Fábrega, Santi
AB 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.
PB SPIE-Int Soc Optical Engineering
SN 0277-786X
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/18724
UL https://hdl.handle.net/20.500.14352/18724
LA eng
NO © 2018 SPIE. Artículo firmado por 84 autores. Conference on Ground-Based and Airborne Instrumentation for Astronomy (VII. 2018. Austin, TX, USA).
DS Docta Complutense
RD 15 ago 2024