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The Hubble Space Telescope Frontier Fields

Abell 2744

MACS J0416.1-2403

MACS J0717.5+3745

MACS J1149.5+2223

Abell S1063

Abell 370

This is the primary Archive website for accessing all the Hubble Space Telescope Frontier Fields program data, which is a new initiative of six deep fields centered on strong lensing galaxy clusters (drawn from Abell et al. 1989) and the MACS survey (Ebeling et al. 2001), in parallel with six deep "blank fields" adjacent to these clusters. Please refer also to the main Frontier Fields project website where additional information is presented about the project, the team, and links to a blog. The program devotes 140 orbits to each cluster/blank field pair, imaging them to AB ≈ 28.7-29 mag with ACS (F435W, F606W, F814W) and and WFC3/IR (F105W, F125W, F140W, F160W). We are providing a variety of products for these clusters, including:

Also please visit the Spitzer Frontier Fields website for access to all the Spitzer data on the Frontier Fields.
Please also include the following acknowledgement in all publications that make use of these data;
Based on observations obtained with the NASA/ESA Hubble Space Telescope, retrieved from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI). STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555.

Zeropoints for all the HST mosaics (ACS and WFC3; ABmag; infinite aperture):
F435W F606W F814W
25.665 26.493 25.947
F105W F125W F140W F160W
26.2687 26.2303 26.4524 25.9463

Latest news:

January 9, 2015: New v0.5 HST mosaics released for Epoch 1 of MACSJ1149.5+2223

We are pleased to announce new v0.5 HST mosaics for the cluster MACSJ1149.5+2223, from the observations of this target from our Frontier Fields program ID 13504 (PI: J. Lotz). The observations for this epoch are now complete at a total of 70 orbits, which we have combined into mosaics on the main cluster field observed with WFC3/IR (F105W, F125W, F140W, F160W) and on the parallel field with ACS (F435W, F606W, F814W). We note that these v0.5 mosaics do not yet include older archival data from CLASH or from other programs; this is to help facilitate study of transient phenomena, for which the data from our program 13504 can be compared with other datasets. All other archival data will be combined together with the Frontier Fields data when we release the full-depth v1.0 mosaics. The current v0.5 mosaics have all been processed beyond the default pipeline calibration. For ACS, these mosaics incorporate CTE correction and bias destriping, while the WFC3/IR mosaics have been masked for persistence, bad pixels, and other detector defects, and also include a set that have been corrected for time-variable background emission in the IR. All the mosaics are aligned to a common pixel grid, as well as to an absolute astrometric frame based on pre-existing catalogs of this field. Further details are provided in the readme file, which can be obtained along with all the mosaics at the following link:

Current HST observing schedule for these fields: (click the graphic for an interactive version):

Access to all HST data on these fields:

  • Via your browser: is the starting navigation point to all the data on these clusters.
  • FTP:
    ftp and login as anonymous.
    cd /pub/hlsp/frontier
    From there you can navigate through the site to find the field and data of interest.
  • WGET
    You can download whole directories of data using wget commands like:
    wget -nH --cut-dirs=5 -r -l0 -c -N -np -R 'index*' -erobots=off

Cluster Name z Cluster Parallel Field HST
RA Dec RA Dec
Year 1:
Abell 2744 0.308 00:14:21.2 -30:23:50.1 00:13:53.6 -30:22:54.3 Abell 2744 Display
MACSJ0416.1-2403 0.396 04:16:08.9 -24:04:28.7 04:16:33.1 -24:06:48.7 MACSJ0416-2403 Display
Year 2:
MACSJ0717.5+3745 0.545 07:17:34.0 +37:44:49.0 07:17:17.0 +37:49:47.3 MACSJ0717+3745 Display
MACSJ1149.5+2223 0.543 11:49:36.3 +22:23:58.1 11:49:40.5 +22:18:02.3 MACSJ1149+2223 Display
Year 3:
Abell S1063
0.348 22:48:44.4 -44:31:48.5 22:49:17.7 -44:32:43.8 Abell S1063 Display
Abell 370 0.375 02:39:52.9 -01:34:36.5 02:40:13.4 -01:37:32.8 Abell 370 Display


Abell, G. O., Corwin, H. G., Jr., & Olowin, R. P. 1989, ApJS, 701, 1

Ebeling, H., Edge, A. C., Bohringer, H. et al. 1998, MNRAS, 301, 881

Ebeling, H., Edge, A. C. & Henry, J. P. 2001, ApJ, 553, 668