Publication: MEGARA MOS: where are my positioners and fibers pointing to?
Loading...
Official URL
Full text at PDC
Publication Date
2018
Authors
Pérez Calpena, Ana
Sánchez-Blanco Mancera, Ernesto
Gómez Álvarez, Pedro
Martínez Delgado, Ismael
Castillo Morales, África
Gil de Paz, Armando
Arrillaga, Xabier, Xabier
García Vargas, Marisa Luisa
Carrasco Licea, Esperanza
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
SPIE-Int Soc Optical Engineering
Citations
Exportar
Abstract
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.
Description
© (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)