THROUGH THE LOOKING GLASS: HST SPECTROSCOPY OF FAINT GALAXIES LENSED BY THE FRONTIER FIELDS CLUSTER MACSJ0717.5 3745
KB Schmidt, T Treu, GB Brammer, M Bradac, X Wang, M Dijkstra, A Dressler, A Fontana, R Gavazzi, AL Henry, A Hoag, TA Jones, PL Kelly, MA Malkan, C Mason, L Pentericci, B Poggianti, M Stiavelli, M Trenti, A von der Linden Show all
ASTROPHYSICAL JOURNAL LETTERS | IOP PUBLISHING LTD | Published : 2014
The Grism Lens-Amplified Survey from Space (GLASS) is a Hubble Space Telescope (HST) Large Program, which will obtain 140 orbits of grism spectroscopy of the core and infall regions of 10 galaxy clusters, selected to be among the very best cosmic telescopes. Extensive HST imaging is available from many sources including the CLASH and Frontier Fields programs. We introduce the survey by analyzing spectra of faint multiply-imaged galaxies and z ≳ 6 galaxy candidates obtained from the first 7 orbits out of 14 targeting the core of the Frontier Fields cluster MACSJ0717.5+3745. Using the G102 and G141 grisms to cover the wavelength range 0.8-1.7 μm, we confirm four strongly lensed systems by dete..View full abstract
Awarded by NASA
This Letter is based on observations made with the NASA/ESA Hubble Space Telescope, obtained at STScI. We acknowledge support through grants HST-13459, HST-GO13177, and HST-AR13235. This work utilizes gravitational lensing models produced by PIs Bradac, Ebeling, Merten, Zitrin, Sharon, and Williams funded as part of the HST Frontier Fields program conducted by STScI. STScI is operated by AURA, Inc. under NASA contract NAS 5-26555. The lens models were obtained from the Mikulski Archive for Space Telescopes (MAST). The Dark Cosmology Centre (DARK) is funded by the Danish National Research Foundation. Some of the data presented herein were obtained at the W. M. Keck Observatory. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community.