spacer link to MAST page spacer logo image spacer

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 data from the Hubble Space Telescope Frontier Fields program, 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 to the Frontier Fields project website for more general information about the project. We provide here a variety of products, including:

Also please visit the Spitzer Frontier Fields website for access to all the Spitzer data on the Frontier Fields.
All the HST Frontier Fields high-level science mosaics and images provided here have been produced by:
    The HST Frontier Fields Science Products Team: A. M. Koekemoer, J. Mack, J. Lotz, J. Anderson,
             R. Avila, E. Barker, D. Borncamp, H. Gunning, B. Hilbert, H. Khandrika, R. Lucas, S. Ogaz,
             B. Porterfield, M. Robberto, B. Sunnquist

(initial presentations were by Lotz et al. 2014, AAS 223, #254.01 and Koekemoer et al. 2014, AAS 223, #254.02).
Please cite both Lotz et al. (2016, ApJ, submitted) for the survey design paper,
and Koekemoer et al. (2016, ApJS, in preparation) for the HST data description paper.
Please sign up for our Announcement Email List for notifications of all new products!
  • Send an email to LISTSERV@MAILLIST.STSCI.EDU
  • Subject: leave this blank
  • Body of the email message:
    subscribe FRONTIERFIELDS-ANNOUNCEMENTS Firstname Lastname
  • Check your email for an automated message containing a confirmation link
  • Please 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.
    Latest news:

    August 29, 2016: New v0.5 HST mosaics released for Epoch 2 of Abell 370

    We are pleased to announce the v0.5 release of the new HST mosaics obtained for epoch 2 on the cluster Abell 370, from the first 46 orbits of observations of epoch 2 of this target from our ongoing Frontier Fields program ID 14038 (PI: J. Lotz), also including public archival ACS and WFC3/IR imaging data from programs 11108 (PI: E. Hu), 11507 (PI: K. Noll), 11591 (PI: J.-P. Kneib), 13459 (PI: T. Treu), and 14216 (PI: R. Kirshner). These have all been combined to provide the most complete full-depth mosaics in the ACS/WFC and WFC3/IR filters that are used for the Frontier Fields program, where all data have been fully reprocessed using the most current calibration files. These mosaics have all been processed beyond the default pipeline calibration, in order to produce the best possible quality, science-ready full-depth mosaics. For ACS, these mosaics incorporate CTE correction and bias destriping, as well as a set of mosaics that have been processed with the new selfcal approach to better correct for low-level dark current structure. The WFC3/IR mosaics have been masked for persistence and bad pixels, and in addition include a set of mosaics that have been corrected for time-variable sky emission that can occur during the orbit and can otherwise impact the up-the-ramp count-rate fitting if not properly corrected. All these 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:


    In addition, we are working on v2.0 releases for the currently completed Frontier Fields clusters, which contain a variety of processing and calibration improvements relative to the v1.0 releases for these clusters, including:

    • Improved removal of low-level background flatfield residuals
    • Improved astrometry, including new time-dependent distortion models
    • Reprocessing using the latest ACS self-calibration algorithms and updated WFC3/IR time-variable background removal for all data
    • Improved masking and removal of persistence in the WFC3/IR data
    • Consolidating all ACS and WFC3 imaging obtained by HST on each cluster (including more recent data, if publicly available) into complete full-depth mosaics.
    These v2.0 releases will be distributed as soon as the above processing improvements are complete, and will be announced here once they are completed and made available.



    Access to all HST data on these fields:

    • Via your browser:
      http://archive.stsci.edu/pub/hlsp/frontier/ is the starting navigation point to all the data on these clusters.
    • FTP:
      ftp archive.stsci.edu 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 http://archive.stsci.edu/pub/hlsp/frontier/macs0416/images/hst/


    Cluster Name z Cluster Parallel Field HST
    FOV
    Interactive
    Display
    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
    (RXCJ2248.7-4431)
    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


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


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

    In addition, we have started to work on v2.0 releases for all 4 Frontier Fields clusters that are currently complete, namely Abell 2744, MACS J0416.1-2403, MACS J0717.5+3745, and MACSJ1149.5+2223, before the observations begin for the final 2 clusters (which will also have v2.0 processing done after their v1.0 releases are complete). These v2.0 releases contain a variety of processing and calibration improvements relative to the current v1.0 releases, including:

    • Improved removal of low-level background flatfield residuals
    • Improved astrometry, including new time-dependent distortion models
    • Reprocessing using the latest ACS self-calibration algorithms and updated WFC3/IR time-variable background removal for all data
    • Improved masking and removal of persistence in the WFC3/IR data
    • Consolidating all ACS and WFC3 imaging obtained by HST on each cluster (including more recent data, if publicly available) into complete full-depth mosaics.
    These v2.0 releases will be distributed later in 2015, once the above processing improvements are complete, and will also be subsequently carried out for the remaining Frontier Fields clusters once their observations are complete.


    References:

    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