MEGARA, the new intermediate-resolution optical IFU and MOS for GTC: getting ready for the telescope

MEGARA (Multi-Espectrógrafo en GTC de Alta Resolución para Astronomía) is an optical Integral-Field Unit (IFU) and Multi-Object Spectrograph (MOS) designed for the GTC 10.4m telescope in La Palma that is being built by a Consortium led by UCM (Spain) that also includes INAOE (Mexico), IAA-CSIC (Spain), and UPM (Spain). The instrument is currently finishing AIV and will be sent to GTC on November 2016 for its on-sky commissioning on April 2017. The MEGARA IFU fiber bundle (LCB) covers 12.5x11.3 arcsec2 with a spaxel size of 0.62 arcsec while the MEGARA MOS mode allows observing up to 92 objects in a region of 3.5x3.5 arcmin2 around the IFU. The IFU and MOS modes of MEGARA will provide identical intermediate-to-high spectral resolutions (RFWHM~6,000, 12,000 and 18,700, respectively for the low-, mid- and high-resolution Volume Phase Holographic gratings) in the range 3700-9800ÅÅ. An x-y mechanism placed at the pseudo-slit position allows (1) exchanging between the two observing modes and (2) focusing the spectrograph for each VPH setup. The spectrograph is a collimator-camera system that has a total of 11 VPHs simultaneously available (out of the 18 VPHs designed and being built) that are placed in the pupil by means of a wheel and an insertion mechanism. The custom-made cryostat hosts a 4kx4k 15-μm CCD. The unique characteristics of MEGARA in terms of throughput and versatility and the unsurpassed collecting are of GTC make of this instrument the most efficient tool to date to analyze astrophysical objects at intermediate spectral resolutions. In these proceedings we present a summary of the instrument characteristics and the results from the AIV phase. All subsystems have been successfully integrated and the system-level AIV phase is progressing as expected

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 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 RFWHM ~ 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 arcsec 2 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. © 2018 SPIE

De Raíz Diversa. Revista Especializada en Estudios Latinoamericanos (Vol. 1 no. 1 abr-sep 2014)

Índice Autores que colaboran en este número . . . . . . . . . . . . . . 9 Editorial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 ARTÍCULOS Pasado sin futuro y futuro sin pasado Eduardo Subirats . . . . . . . . . . . . . . . . . . . . . . . . . 17 Filosofía y pensamiento crítico latinoamericano de la actualidad Mario Magallón Anaya . . . . . . . . . . . . . . . . . . . . . 41 Interdisciplina, hibridación y diferencia. Algunos rubros de su discusión actual en América Latina Roberto Follari . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Las múltiples caras de la islamofobia Ramón Grosfoguel . . . . . . . . . . . . . . . . . . . . . . . . 83 Transculturación y espacialidad del capital. A propósito de Contrapunteo cubano del tabaco y el azúcar Víctor Hugo Pacheco Chávez. . . . . . . . . . . . . . . . . . 115 La EscuelaAyllu de Warisata, Bolivia y sus relaciones con México Arturo Vilchis Cedillo. . . . . . . . . . . . . . . . . . . . . . 145 La querella intelectual del quechuaymara Fausto Reinaga contra Fernando Diez de Medina Esteban Ticona Alejo . . . . . . . . . . . . . . . . . . . . . . . 171 Las diferencias entre la geopolítica española y la portuguesa tras su encuentro con el Nuevo Mundo María del Pilar Ostos Cetina . . . . . . . . . . . . . . . . . 185 Reimaginação do cinema latino-americano Sebastiao Guilherme Albano . . . . . . . . . . . . . . . . . . 205 RESEÑAS José Guadalupe Gandarilla Salgado. Asedios a la totalidad. Poder y política en la modernidad desde un encare de-colonial Ambrosio Velasco . . . . . . . . . . . . . . . . . . . . . . . . . 229 Roberto García Ferreira. Bajo vigilancia: La CIA, la policía uruguaya y el exilio de Arbenz, 1957-60 Silvina M. Romano . . . . . . . . . . . . . . . . . . . . . . . . . 235 Francesca Gargallo. Feminismos desde Abya Yala: Ideas y proposiciones de las mujeres de 607 pueblos de nuestra América Sandra Escutia . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Argelia Pacheco Díaz. Relaciones comerciales entre Hamburgo, Puerto Rico y St. Th omas: 1814-1867 María del Rosario Rodríguez Díaz . . . . . . . . . . . . . . 24

Memorias del primer Simposio Nacional de Ciencias Agronómicas

Primer simposio nacional de Ciencias Agronómicas: El renacer del espacio de discusión científica para el Agro colombiano

Memorias del primer Simposio Nacional de Ciencias Agronómicas

Primer simposio nacional de Ciencias Agronómicas: El renacer del espacio de discusión científica para el Agro colombiano