MUSE and HFFs Photometry of A2744 : J/MNRAS/473/663

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Authors : Mahler G. orcid , Richard J., Clement B. (hide) , Richard J., Clement B. et..al

VizieR DOI : 10.26093/cds/vizier.74730663
Bibcode : 2018MNRAS.473..663M (ADS) (Simbad) (Objects)
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CDS Keywords : Clusters, galaxy; Photometry, HST; Spectroscopy
UAT : Galaxy clusters, HST photometry, Spectroscopy

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Inserted into VizieR : 30-Sep-2019
Last modification : 18-Aug-2024

Strong-lensing analysis of A2744 with MUSE and Hubble Frontier Fields images. (2018)

Keywords : gravitational lensing strong - techniques: imaging spectroscopy - galaxies: clusters: individual: Abell 2744 - galaxies: high redshift - dark matter

Abstract:We present an analysis of Multi Unit Spectroscopic Explorer (MUSE) observations obtained on the massive Frontier Fields (FFs) cluster A2744. This new data set covers the entire multiply imaged region around the cluster core. The combined catalogue consists of 514 spectroscopic redshifts (with 414 new identifications). We use this redshift information to perform a strong-lensing analysis revising multiple images previously found in the deep FF images, and add three new MUSE-detected multiply imaged systems with no obvious Hubble Space Telescope counterpart. The combined strong-lensing constraints include a total of 60 systems producing 188 images altogether, out of which 29 systems and 83 images are spectroscopically confirmed, making A2744 ...(more)
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Monthly Notices policies
The HFF observations of A2744 (ID: 13495, PI: J. Lotz) were taken between 2013 October 25 and 2014 July 1 in seven different filters, three with the Advanced Camera for Surveys (ACS; F435W, F606W, F814W) and four taken with the Wide Field Camera 3 (WFC3; F105W, F125W, F140W and F160W). In total 280 orbits were devoted to A2744 reaching in each filter a 5{sigma} limiting magnitude AB~29. The self-calibrated data provided by Space Telescope Science Institute (STScI, https://archive.stsci.edu/missions/hlsp/frontier/abell2744/images/hst/) (version v1.0 for WFC3 and v1.0-epoch2 for ACS) with a pixel size of 60mas are used in this study. A2744 was observed with the Multi Unit Spectrographic Explorer (MUSE) between 2014 September and 2015 October as part of the GTO Program 094.A-0115 (PI: Richard). A 2x2 mosaic of MUSE pointings was designed to cover the entire multiple image area, centred at RA=00:14:20.952 and DE=-30:23:53.88. The four quadrants were observed for a total of 3.5, 4, 4 and 5h, in addition to 2h at the centre of the cluster. 


                


                

                    

                


                

                    

                


                

                    
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