RELICS: Reionization Lensing Cluster Survey
- 10 October 2019
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 884 (1), 85
- https://doi.org/10.3847/1538-4357/ab412b
Abstract
Large surveys of galaxy clusters with the Hubble Space Telescope (HST) and Spitzer, including the Cluster Lensing And Supernova survey with Hubble and the Frontier Fields, have demonstrated the power of strong gravitational lensing to efficiently deliver large samples of high-redshift galaxies. We extend this strategy through a wider, shallower survey named RELICS, the Reionization Lensing Cluster Survey, described here. Our 188-orbit Hubble Treasury Program observed 41 clusters at 0.182 <= z <= 0.972 with Advanced Camera for Surveys (ACS) and WFC3/IR imaging spanning 0.4-1.7 mu m. We selected 21 of the most massive clusters known based on Planck PSZ2 estimates and 20 additional clusters based on observed or inferred lensing strength. RELICS observed 46 WFC3/IR pointings (similar to 200 arcmin(2.)) each with two orbits divided among four filters (F105W, F125W, F140W, and F160W) and ACS imaging as needed to achieve single-orbit depth in each of three filters (F435W, F606W, and F814W). As previously reported by Salmon et al., we discovered over 300 z similar to 6-10 candidates, including the brightest z similar to 6 candidates known, and the most distant spatially resolved lensed arc known at z similar to 10. Spitzer IRAC imaging (945 hr awarded, plus 100 archival, spanning 3.0-5.0 mu m) has crucially enabled us to distinguish z similar to 10 candidates from z similar to 2 interlopers. For each cluster, two HST observing epochs were staggered by about a month, enabling us to discover 11 supernovae, including 3 lensed supernovae, which we followed up with 20 orbits from our program. Reduced HST images, catalogs, and lens models are available on MAST, and reduced Spitzer images are available on IRSA.Funding Information
- HST RELICS Program GO 14096 (O1730/GO-14096)
This publication has 209 references indexed in Scilit:
- THE CHANGING Lyα OPTICAL DEPTH IN THE RANGE 6 < z < 9 FROM THE MOSFIRE SPECTROSCOPY OF Y -DROPOUTSThe Astrophysical Journal Letters, 2013
- The three-dimensional geometry and merger history of the massive galaxy cluster MACS J0358.8−2955Monthly Notices of the Royal Astronomical Society, 2012
- A WEAK-LENSING AND NEAR-INFRARED STUDY OF A3192: DISASSEMBLING A RICHNESS CLASS 3 ABELL CLUSTERThe Astrophysical Journal Letters, 2012
- CANDELS: THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEY—THE HUBBLE SPACE TELESCOPE OBSERVATIONS, IMAGING DATA PRODUCTS, AND MOSAICSThe Astrophysical Journal Supplement Series, 2011
- CANDELS: THE COSMIC ASSEMBLY NEAR-INFRARED DEEP EXTRAGALACTIC LEGACY SURVEYThe Astrophysical Journal Supplement Series, 2011
- PHAT: PHoto-zAccuracy TestingAstronomy & Astrophysics, 2010
- MACS: A Quest for the Most Massive Galaxy Clusters in the UniverseThe Astrophysical Journal, 2001
- The ROSAT Brightest Cluster Sample — IV. The extended sampleMonthly Notices of the Royal Astronomical Society, 2000
- [ITAL]Infrared Space Observatory[/ITAL] Measurements of [C [CSC]ii[/CSC]] Line Variations in GalaxiesThe Astrophysical Journal, 1997
- A Pair of Lensed Galaxies at [CLC][ITAL]z[/ITAL][/CLC] = 4.92 in the Field of CL 1358+62The Astrophysical Journal, 1997