RT Journal Article
T1 MEGARA MOS: where are my positioners and fibers pointing to?
A1 Pérez Calpena, Ana
A1 Sánchez-Blanco Mancera, Ernesto
A1 Gómez Álvarez, Pedro
A1 Martínez Delgado, Ismael
A1 Castillo Morales, María África
A1 Gil De Paz, Armando
A1 Arrillaga, Xabier, Xabier
A1 García Vargas, Marisa Luisa
A1 Gallego Maestro, Jesús
A1 Carrasco Licea, Esperanza
A1 Iglesias Páramo, Jorge;, Jorge
A1 Cedazo, Raquel
AB MEGARA is an integral-field and multi-object medium-resolution spectrograph for the GTC 10.4m telescope, which was commissioned on June - August 2017. MEGARA offers two observing modes, the LCB mode, a large central IFU; and a Multi-Object Spectrograph (MOS) mode, composed by 92 robotic positioners carrying 7-fiber minibundles each. This paper presents the models and measurements developed for the alignment between the image of the telescope pupil and the 100-itm fiber cores during the integration and verification at the laboratory. On the one hand, the error in the positioner-minibundles assembly was optimized with the aim of achieving a fiber-to-fiber flux homogeneity better than 10%. On the other hand, the positioner pointing was characterized in order to achieve a pointing precision of 1/5 of the spaxel size (which has been designed to be 0.62 arcsec). The on-sky measurements obtained during the commissioning to verify our laboratory results are also presented.
PB SPIE-Int Soc Optical Engineering
SN 0277-786X
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/18696
UL https://hdl.handle.net/20.500.14352/18696
LA eng
NO © (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. Conference on Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation (III. 2018. Austin, TX)
DS Docta Complutense
RD 9 abr 2025