Authors:
Martínez-Delgado, I.;Sánchez-Blanco, E.;Pérez-Calpena, A.;García-Vargas, M. L.;Maldonado, X. M.;Gil de Paz, A.;Carrasco, E.;Gallego, J.;Iglesias-Páramo, J.;Sánchez-Moreno, F. M.
Journal:
Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
Abstract:
<p>MEGARA is a third generation spectrograph for the Spanish 10.4m telescope (GTC) providing two observing modes: a large central Integral Field Unit (IFU), called the Large Compact Bundle (LCB), covering a FOV of 12.5 × 11.3 arcsec<sup>2</sup>, and a Multi-Object Spectrograph (MOS) with a FOV of 3.5 × 3.5 arcmin<sup>2</sup>. MEGARA will observe the whole visible range from 3650A to 10000A allowing different spectral resolutions (low, medium and high) with R = 6000, 11000 and 18000 respectively. The dispersive elements are placed at the spectrograph pupil position in the path of the collimated beam and they are composed of a set of volume phase hologram gratings (VPHs) sandwiched between two flat windows and coupled in addition to two prisms in the case of the medium- and high-resolution units. We will describe the tests and setups developed to check the requirements of all units, as well as the obtained performance at laboratory</p>
URL:
https://ui.adsabs.harvard.edu/#abs/2016SPIE.9912E..4DM/abstract