Thanks to the combined powers of Hubble and gravitational lensing, the Frontier Fields will be the deepest images of the cosmos ever obtained. But to fully understand these images, we need to account and correct for the observed gravitational lensing.
Five independent teams worked all summer on lensing maps for the six Frontier Fields clusters. We have been ingesting these and now have the Abell 2744 lensing models ready for the community in time for the first observations October 25!
Users may download the models directly or use our web interface to calculate magnifications with uncertainties for any lensed galaxy they find given its RA, Dec, and redshift. This will provide users with multiple magnification estimates derived independently from the five teams.
To whet your appetite, the Abell 2744 magnification maps for a lensed source at z = 9 are shown below. Four of the models assume that light traces mass, while three do not.
The Frontier Fields lensing models for Abell 2744.
These models are based on a common set of input data, including pre-Frontier-Fields archival HST imaging and a common set of lensed galaxies. The models cover regions constrained by strongly lensed, multiply-imaged galaxies within the HST ACS fields-of-view of the cluster cores.
For complete information about the Frontier Fields lensing models, see http://archive.stsci.edu/prepds/frontier/lensmodels/.
We will be releasing the models for the remaining clusters in the coming weeks.
Are you ready to see the distant universe through nature’s telescopes?