Gil De Paz, ArmandoGallego Maestro, JesúsCastillo Morales, María ÁfricaEliche Moral, María del CarmenMarino, Raffaella AnnaPascual Ramírez, SergioSánchez Penim, AinhoaZamorano Calvo, JaimeCardiel López, NicolásPérez González, Pablo GuillermoVillar, V.2023-06-192023-06-192014Paz, A. Gil de, J. Gallego, E. Carrasco, J. Iglesias-Páramo, R. Cedazo, J. M. Vílchez, M. L. García-Vargas, et al. «MEGARA: a new generation optical spectrograph for GTC». En Ground-based and Airborne Instrumentation for Astronomy V, 9147:215-30. SPIE, 2014. https://doi.org/10.1117/12.2047825.0277-786X10.1117/12.2047825https://hdl.handle.net/20.500.14352/34815Conference on Ground-Based and Airborne Instrumentation for Astronomy (5th. 2014. Montreal, Canada). © 2014 SPIE, the international society for optics and photonics.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. MEGARA offers two IFU fiber bundles, one covering 12.5x11.3 arcsec^2 with a spaxel size of 0.62 arcsec (Large Compact Bundle; LCB) and another one covering 8.5x6.7 arcsec^2 with a spaxel size of 0.42 arcsec (Small Compact Bundle; SCB). The MEGARA MOS mode will allow observing up to 100 objects in a region of 3.5x3.5 arcmin^2 around the two IFU bundles. Both the LCB IFU and MOS capabilities of MEGARA will provide intermediate-to-high spectral resolutions (R_FWHM∽6,000, 12,000 and 18,700, respectively for the low-, mid-and high-resolution Volume Phase Holographic gratings) in the range 3650-9700 ÅÅ. These values become R_FWHM∽7,000, 13,500, and 21,500 when the SCB is used. A mechanism placed at the pseudo-slit position allows exchanging the three observing modes and also acts as focusing mechanism. 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 an E2V231-84 4kx4k CCD. The UCM (Spain) leads the MEGARA Consortium that also includes INAOE (Mexico), IAA-CSIC (Spain), and UPM (Spain). MEGARA is being developed under a contract between GRANTECAN and UCM. The detailed design, construction and AIV phases are now funded and the instrument should be delivered to GTC before the end of 2016.engjournal articlehttp://dx.doi.org/10.1117/12.2047825http://proceedings.spiedigitallibrary.org/open access52Instrumentation: spectrographsTechniques: spectroscopicGalaxies: local groupSpiralKinematics and dynamicsISM: kinematics and dynamicsAstrofísicaAstronomía (Física)