GALACSI is part of the Adaptive Optics Facility, AOF, an AO system developed to increase the performance of MUSE, using a 4 laser guide star (LGS) system and a deformable secondary mirror to provide a wave-front corrected for the turbulent atmospheric ground layer in WFM and tomographic correction in NFM. Starting in P103 GALACSI started to deliver a laser tomography adaptive optics (LTAO) corrected field covering a 7.5' x 7.5' field of view (Narrow-Field Mode, NFM), providing near diffraction limited images with a sampling of 0.025' per spatial pixel.
Starting in P101, in addition to the natural seeing or NOAO mode, MUSE has been offered in Wide Field Mode with Ground Layer Adaptive Optics (GLAO) using the GALACSI module. In Wide-Field Mode (WFM), MUSE splits a field of 1 arcmin 2 into 24 channels which are further sliced into 48 15'x0.2' slitlets. Each set of 48 mini slits is injected into one of the spectrographs to produce a set of medium resolution spectra.
: to think or say (something) in a thoughtful way I could sell the house, she mused, but where would I go muse. It splits the field of view into 24 image segments or channels which are further sliced into 48 slices or mini slits, giving a total of 1152 mini slits. What does mused mean definition 1 : to become absorbed in thought especially : to think about something carefully and thoroughly musing about what might have been.
