Spectroscopy of 26 lensing cluster cores (Bayliss+, 2011)

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Redshifts, Clusters: Galaxy, Gravitational Lensing, Spectroscopy, Velocity Dispersion

Scientific paper

We observed a sample of 26 clusters with the Frederick C. Gillett Telescope (Gemini North) between 2008 February and 2010 June as part of Gemini programs GN-2008A-Q-25 and GN-2009A-Q-21. We obtained pre-imaging of 20 of the 26 clusters in gri with the Gemini Multi-Object Spectrograph (GMOS). In addition to the Gemini/GMOS-North spectroscopy, we supplement our data set with cluster member redshift measurements made at the 3.5m Astrophysical Research Consortium (ARC) Telescope at Apache Point Observatory in New Mexico, using the Dual Imaging Spectrograph (DIS) in long-slit mode.
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