First performance of the gems + gmos system. Part1. Imaging
arXiv:1604.03527 · doi:10.1093/mnras/stw715
Abstract
During the commissioning of the Gemini MCAO System (GeMS), we had the opportunity to obtain data with the Gemini Multi-Object Spectrograph (GMOS), the most utilised instrument at Gemini South Observatory, in March and May 2012. Several globular clusters were observed in imaging mode that allowed us to study the performance of this new and untested combination. GMOS is a visible instrument, hence pushing MCAO toward the visible.We report here on the results with the GMOS instruments, derive photometric performance in term of Full Width Half Maximum (FWHM) and throughput. In most of the cases, we obtained an improvement factor of at least 2 against the natural seeing. This result also depends on the Natural Guide Star constellation selected for the observations and we then study the impact of the guide star selection on the FWHM performance.We also derive a first astrometric analysis showing that the GeMS+GMOS system provide an absolute astrometric precision better than 8mas and a relative astrometric precision lower than 50 mas.
13 pages, 11 figures, accepted for publication in MNRAS on March 23rd 2016
References in corpus (27)
- The SIMBAD astronomical database
- Rotation-invariant convolutional neural networks for galaxy morphology prediction
- The Subaru Coronagraphic Extreme Adaptive Optics system: enabling high-contrast imaging on solar-system scales
- A Redshift z = 6.56 Galaxy Behind the Cluster Abell 370
- Gemini multi-conjugate adaptive optics system review I: Design, trade-offs and integration
- A Faint Star-Forming System Viewed Through the Lensing Cluster Abell 2218: First Light at z~5.6?
- The Nature and Origin of Low-Redshift O VI Absorbers
- Gemini multi-conjugate adaptive optics system review II: Commissioning, operation and overall performance
- Reconstructing Galaxy Histories from Globular Clusters
- Accurate seeing measurements with MASS and DIMM
- The Sources of Intergalactic Metals
- High Precision Astrometry with MICADO at the European Extremely Large Telescope
- Getting Lucky with Adaptive Optics: Fast AO Image Selection in the Visible with a Large Telescope
- The Globular Cluster Kinematics and Galaxy Dark Matter Content of NGC 4649 (M60)
- Ram pressure stripping in Planetary Nebulae
- The enrichment history of cosmic metals
- Astrometric performance of the Gemini multi-conjugate adaptive optics system in crowded fields
- Atmospheric turbulence profiling using multiple laser star wavefront sensors
- Herschel-ATLAS and ALMA: HATLAS J142935.3-002836, a lensed major merger at redshift 1.027
- Combining human and machine learning for morphological analysis of galaxy images
- Mapping the differential reddening in globular clusters
- FALCON: a concept to extend adaptive optics corrections to cosmological fields
- Characterization of the sodium layer at Cerro Pachon, and impact on laser guide star performance
- G2C2 II: Integrated colour-metallicity relations for Galactic Globular Clusters in SDSS passbands
- A wall of dust around a proto-Mira
- Morphological Evolution of Distant Galaxies from Adaptive Optics Imaging
- Rise of the machines: first year operations of the Robo-AO visible-light laser-adaptive optics instrument