Hubble Legacy Fields Data Release V2.5
The GOODS-N and GOODS-S Regions

Highlights of the Hubble Legacy Fields (HLF)

HLF-GOODS-N
HLF-GOODS-S

Overview


This describes the V2.5 version data release of the Hubble Legacy Fields (HLF) project for the GOODS-North and GOODS-South regions from the HST archival programs AR-13252 and AR-15027. The V2.5 version of the HLF dataset provides WFC3/UV, ACS/WFC and WFC3/IR source catalogs and image mosaics covering a 25 x 25 arcminute area plus (smaller) cutouts of four deep areas in the GOODS-South field and image mosaics covering a 20.5 x 20.5 arcminute area in the GOODS-North field. All the data covering the original HUDF field within the GOODS-South area were previously released as a high level science product as the eXtreme Deep Field (XDF — sometimes referred to as the XDF/HUDF field).

HLF Release: The release combines exposures from Hubble's two main cameras, the Advanced Camera for Surveys Wide Field Channel (ACS/WFC) and the Wide Field Camera 3 (WFC3), including data from both the infrared channel (WFC3/IR) and the UV/visible channel (WFC3/UVIS). These data were taken over more than a decade between mid-2002 to the end of 2020. The HLF includes essentially all the near-uv (WFC3/UV F225W, F275W, F336W), optical (ACS/WFC F435W, F606W, F775W, F814W and F850LP filters) and infrared (WFC3/IR F098M, F105W, F125W, F140W and F160W filters) filters. The HLF includes data taken by Hubble over the original CDF-North/South region including the GOODS-N/S, CANDELS, ERS, the Extended CDF-S (ECDF-S), numerous SNe followup programs, and many other programs. Given that this dataset combines all images in the archive on the ECDF-S to date from numerous different programs, the HST AR-13252 and AR-15027 proposals identified the product under a single global name "Hubble Legacy Fields".

Astrometric Frame: A particularly challenging aspect, given the large area, was to establish a robust astrometric framework. A global astrometric solution was bootstrapped from the smaller datasets. All the HLF image mosaics have been produced using a coordinate grid tied to an absolute Gaia DR2 reference frame. We also provide an alternate coordinate system using the same tangent point as the original GOODS-N/S datasets.

Exposure Time: The total HST on-target exposure time of all the data incorporated in the HLF-GOODS-N is 3.6 Msec and 6.4 MSec in the HLF-GOODS-S. The HLF-GOODS-N and HLF-GOODS-S dataset are derived from 5817 and 7491 exposures, respectively, and taken from 33 different HST programs. This on-target exposure time is equivalent to that of about 4181 orbits (assuming that the exposure in a typical orbit is 2400s). This total exposure corresponds to over ~120% of a full HST resource cycle! The HLF dataset also includes four very deep pointings from observations made in parallel when HUDF was primary (the HLF-HUDFP1-4 parallel fields). Unlike the XDF/HUDF, these parallel fields have a smaller set of filters and have varying depths, but still constitute a resource of unusually deep fields.

Catalog: A catalog of all the sources in the HLF GOODS-South dataset, with photometry for sources in each of the 13 filters, is also made available with this release. The photometric catalog includes 103,098 objects, selected in either of two near-IR filters (F850LP and F160W). The photometric results are measured in 0.7′′ diameter apertures and corrected to total fluxes based on the F160W curve of growth.

HLF Team: The HLF Team is The HLF Team is Garth Illingworth, Daniel Magee, Rychard Bouwens, Pascal Oesch, Kate Whitaker, Ivo Labbe, Pieter van Dokkum, Mauro Stefanon, Bradford Holden, Marijn Franx, and Valentino Gonzalez. The catalog was led by Katherine Whitaker. Please credit Illingworth et al 2019 when using the HLF HSLP data and products, and Whitaker et al 2019 for the catalog. The UVUDF dataset was graciously provided by Harry Teplitz, Anton Koekemoer, Marc Rafelski, Norman Grogin and the UVUDF Team. If you use any of the HLF-GOODS-S UV data, please also cite Teplitz et al. 2013 and Rafelski et al. 2015.

What's new in V2.5

The HLF V2.5 includes the release of the HLF-GOODS-N dataset. The HLF-GOODS-N comprises 5817 exposures taken over nearly 18 years with WFC3/UVIS, ACS/WFC and WFC3/IR totaling 3.6 million seconds. This is 1516 orbits of data or about 50% of a full one-year Cycle. Note that a substantial fraction (~59%) of these data have never been available as a high-level data product. HLF-GOODS-N dataset incorporates 11 filters consisting of two WFC3/UVIS, five ACS/WFC and four WFC3/IR filters

What's in V2.0

A major change from the HLF-GOODS-S V1.5 data release to the V2.0 release is the inclusion of three UV datasets. These sets constitute a substantial body of UV data, totaling 280 orbits of HST WFC3/UVIS imaging, or about 0.5 Msec of data. The three UV datasets are the Early Release Science (ERS) observations (Windhorst et al 2011), the UltraViolet Ultra-Deep Field (UVUDF) dataset (Teplitz et al. 2013, Rafelski et al. 2015) and the Hubble Deep UltraViolet (HDUV) legacy dataset (Oesch et al 2018, see also Vanzella et al 2016). These datasets were updated and astrometrically matched to the V1.5/V2.0 release of the HLF-GOODS-S. The ERS dataset required a full reprocessing since that has not be available in processed form on MAST. Thus the HLF provides for the first time the release of the WFC3/UV 2009 ERS dataset as a HLSP.

The steps that were taken to assemble the HST UV data along with the HST optical and near-IR data are described in the paper that discusses the assembly of the HLF-GOODS-S dataset (Illingworth et al 2021).

As noted above the V2.0 release now includes a catalog of over 100,000 sources with photometry in all 13 filters (or those sources for which the S/N was adequate for inclusion). See Whitaker et al 2019.

Additionally, we have organized the ACS/WFC and WFC3/IR data into twelve one year epochs from the fourteen years of observations on the ECDF-S, starting with the first epoch from May 2002 to April 2003 (there were two years where no significant additional data was obtained due to ACS/WFC failure in January 2007). See hlf_goodss_v2_epoch_by_filter.pdf.

Observations


The HLF-GOODS-N Field

Field RA Dec Epoch
HLF-GOODS-N 12h36m44s 62d14m25s J2000
HLF-GOODS-N exposure time maps

Shown (left) is the exposure time maps of the regions covered by each filter in the HLF-GOODS-N HLSP dataset. The filters include a total of 11 WFC3/UV, ACS/WFC and WFC3/IR filters (F275W, F336W, F435W, F606W, F775W, F814W, F850LP, F105W, F125W, F140W & F160W). The maps here total ~5800 exposures that comprise the HLF-GOODS-N dataset.

Exposure Times for HLF-GOODS-N Field

Observations included in this version of the HLF-GOODS-N Field were taken from July 2002 to November 2018 from 29 different HST programs.

Filter Exposure Time (s) # of Exposures
HLF-GOODS-N Field
F275W 390386 237
F336W 154512 64
F435W 520936 623
F606W 145877 317
F775W 341478 635
F814W 618824 1163
F850LP 625392 1320
F105W 231306 337
F125W 256718 449
F140W 53364 192
F160W 293676 469
Totals 3637709 5817

Exposure Times for HLF-GOODS-N Field

Program ID Program Title Program PI
9301 Photometry and Grism Spectroscopy in HDF North/South Ford, Holland
9352 The Deceleration Test from Treasury Type Ia Supernovae at Redshifts 1.2 to 1.6 Riess, Adam
9468 ACS Grism Parallel Survey of Emission- line Galaxies at Redshift z pl 7 Yan, Lin
9480 Cosmic Shear With ACS Pure Parallels Rhodes, Jason D.
9583 The Great Observatories Origins Deep Survey: Imaging with ACS Giavalisco, Mauro
9727 Exploration of the SN Ia Hubble Diagram at z > 1.2 Perlmutter, Saul
9728 Tracing the History of Cosmic Expansion to z~2 with Type Ia Supernovae Riess, Adam
9984 Cosmic Shear With ACS Pure Parallels Rhodes, Jason D.
10189 PANS-Probing Acceleration Now with Supernovae Riess, Adam
10339 PANS Riess, Adam
10530 Probing Evolution And Reionization Spectroscopically {PEARS} Malhotra, Sangeeta
10771 CTE and QE measurement for ACS CCDs at three different temperatures Sirianni, Marco
11600 Star formation, extinction and metallicity at 0.7<z<1.5: H-alpha fluxes and sizes from a grism survey of GOODS-N Weiner, Benjamin
12385 External CTE Monitor Chiaberge, Marco
12442 Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey -- GOODS-North Field, Non-SNe-Searched Visits Faber, Sandra M.
12443 Galaxy Assembly and the Evolution of Structure over the First Third of Cosmic Time - III Faber, Sandra M.
12444 Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey -- GOODS-North Field, Middle Visits of SNe Search Faber, Sandra M.
12445 Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey -- GOODS-North Field, Late Visits of SNe Search Faber, Sandra M.
12461 Supernova Follow-up for MCT Riess, Adam
12960 The nature of star formation in two spectroscopically confirmed exceptionally-luminous galaxies beyond a redshift 7 Ono, Yoshiaki
13063 Supernova Follow-up for MCT Riess, Adam
13420 The progenitors of quiescent galaxies at z~2: precision ages and star-formation histories from WFC3/IR spectroscopy Barro, Guillermo
13779 The Faint Infrared Grism Survey (FIGS) Malhotra, Sangeeta
13871 A Spectroscopic Redshift for the Most Luminous Galaxy Candidate at z~10 Oesch, Pascal
13872 The GOODS UV Legacy Fields: A Full Census of Faint Star-Forming Galaxies at z~0.5-2 Oesch, Pascal
14227 The CANDELS Lyman-alpha Emission At Reionization (CLEAR) Experiment Papovich, Casey
15187 Confirmation of the Most Distant Quasar Tilvi, Vithal
15647 Ultraviolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) Teplitz, Harry
15977 Characterizing the Environment Around The Most Distant Known Galaxy Oesch, Pascal

The HLF-GOODS-S Field

Field RA Dec Epoch
HLF-GOODS-S 3h32m29s -27d48m18s J2000
HLF-GOODS-S exposure time maps

Shown (left) is the exposure time maps of the regions covered by each filter in the HLF-GOODS-S HLSP dataset. The XDF/HUDF region is in white indicating the deepest data. The filters include a total of 13 WFC3/UV, ACS/WFC and WFC3/IR filters (F225W, F275W, F336W, F435W, F606W, F775W, F814W, F850LP, F098M, F105W, F125W, F140W & F160W). The maps here total ~7500 exposures that comprise the HLF-GOODS-S dataset.

The HLF-HUDF Parallel Deep Fields

Field RA Dec Epoch
HLF-HUDFP1 3h33m04s -27d41m02s J2000.0
HLF-HUDFP2 3h33m01s -27d50m50s J2000.0
HLF-HUDFP3 3h32m42s -27d55m17s J2000.0
HLF-HUDFP4 3h32m01s -27d48m17s J2000.0
HLF Deep Pointings

The five deep regions within HLF-GOODS-S (HUDF parallels in red and the XDF/HUDF in yellow). Each of these deep regions constitutes an usually deep set of observations, though with varying depth and reduced numbers of filters compared to the XDF/HUDF.

Exposure Times for HLF-GOODS-S Field

Observations included in this version of the HLF-GOODS-S Field were taken from July 2002 to October 2016 from 33 different HST programs.

Filter Exposure Time (s) # of Exposures
HLF-GOODS-S Field
F225W 89576 64
F275W 207222 108
F336W 216150 108
F435W 526952 443
F606W 537944 712
F775W 770190 849
F814W 840211 1288
F850LP 1495092 1902
F098M 53499 68
F105W 484734 429
F125W 440755 598
F140W 115590 218
F160W 596277 704
Totals 6374192 7491

Programs Used for HLF-GOODS-S Field

Program ID Program Title Program PI
9352 The Deceleration Test from Treasury Type Ia Supernovae at Redshifts 1.2 to 1.6 Adam Riess
9425 The Great Observatories Origins Deep Survey: Imaging with ACS Mauro Giavalisco
9480 Cosmic Shear With ACS Pure Parallels Jason D. Rhodes
9488 Cosmic Shear - with ACS Pure Parallel Observations Kavan Ratnatunga
9500 The Evolution of Galaxy Structure from 10, 000 Galaxies with 0.1<z<1.2 Hans-Walter Rix
9575 ACS Default {Archival} Pure Parallel Program William B. Sparks
9793 The Grism-ACS Program for Extragalactic Science {GRAPES} Sangeeta Malhotra
9803 Deep NICMOS Images of the UDF Rodger I. Thompson
9978 The Ultra Deep Field with ACS Steven Beckwith
9984 Cosmic Shear With ACS Pure Parallels Jason D. Rhodes
10086 The Ultra Deep Field with ACS Steven Beckwith
10189 PANS-Probing Acceleration Now with Supernovae Adam Riess
10258 Tracing the Emergence of the Hubble Sequence Among the Most Luminous and Massive Galaxies Claudia Kretchmer
10340 PANS Adam Riess
10530 Probing Evolution And Reionization Spectroscopically {PEARS} Sangeeta Malhotra
10632 Searching for galaxies at z>6.5 in the Hubble Ultra Deep Field Massimo Stiavelli
11144 Building on the Significant NICMOS Investment in GOODS: A Bright, Wide-Area Search for z>=7 Galaxies Rychard Bouwens
11359 Panchromatic WFC3 survey of galaxies at intermediate z: Early Release Science program for Wide Field Camera 3. Robert W. O'Connell
11563 Galaxies at z~7-10 in the Reionization Epoch: Luminosity Functions to <0.2L* from Deep IR Imaging of the HUDF and HUDF05 Fields Garth D. Illingworth
12007 Supernova Followup Garth D. Illingworth
12060 Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey — GOODS-South Field, Non-SNe-Searched Visits Sandra M. Faber
12061 Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey — GOODS-South Field, Early Visits of SNe Search Sandra M. Faber
12062 Galaxy Assembly and the Evolution of Structure over the First Third of Cosmic Time - III Sandra M. Faber
12099 Supernova Follow-up for MCT Adam Riess
12177 3D-HST: A Spectroscopic Galaxy Evolution Treasury Pieter Van Dokkum
12461 Supernova Follow-up for MCT Adam Riess
12498 Did Galaxies Reionize the Universe? Richard S. Ellis
12534 The Panchromatic Hubble Ultra Deep Field: Ultraviolet Coverage Harry Teplitz
12866 A Morphological Study of ALMA Identified Sub-mm Galaxies with HST/WFC3 Mark Swinbank
12990 Size Growth at the Top: WFC3 Imaging of Ultra-Massive Galaxies at 2.0 < z < 3 Adam Muzzin
13779 The Faint Infrared Grism Survey (FIGS) Sangeeta Malhotra
13872 The GOODS UV Legacy Fields: A Full Census of Faint Star-Forming Galaxies at z~0.5-2 Pascal Oesch
14088 Unveiling the Lyman continuum morphology with HST Eros Vanzella

Data Products


Images

This release includes fully reduced, science ready images (*_sci.fits) together with the associated weight maps (*_wht.fits) at 30mas/pixel (for WFC3/UV and ACS only) and 60mas/pixel (for ACS+WFC3/UV/IR images) and source catalogs.

HLF-GOODS-N

The data are organized into sets of images by passband (WFC3/UV F275W & F336W, ACS/WFC F435W, F606W, F775W, F814W & F850LP, WFC3/IR F105W, F125W, F140W & F160W) and image scale. Each 60 milli-arcsecond/pixel HLF-GOODS-N image is 20.5k x 20.5k pixels and each 30 milli-arcsecond/pixel image is 41k x 41k pixels. For each filter we provide the drizzled science image and a weight image. The HLF V2.5 contains the first release of the HLF-GOODS-N dataset.

HLF-GOODS-S

The current version of the HLF-GOODS-S data is at V2.0. We hope to provide a V2.5 in the future which will include new UV data. The data are organized into sets of images by passband (WFC3/UV F225W, F275W & F336W, ACS/WFC F435W, F606W, F775W, F814W & F850LP, WFC3/IR F098M, F105W, F125W, F140W & F160W) and image scale. Each 60 milli-arcsecond/pixel HLF-GOODS-N image is 25k x 25k pixels and each 30 milli-arcsecond/pixel image is 50k x 50k pixels. For each filter we provide the drizzled science image and a weight image. Previous data releases were made available in April 2016 and February 2017. The V2.0 supersedes the V1.0 dataset and the V1.5 dataset due to additional UV data and catalogs.

All images used a drizzle pixfrac parameter value of 0.8 (final_pixfrac=0.8). The weight map image is equal to the inverse variance (i.e., 1/rms^2) per pixel. A detailed discussion of weight map conventions and noise correlation in drizzling, can be found in Casertano et al. 2000, AJ, 120, 2747, especially Section 3.5 and Appendix A.

The data are viewable from a browser at:

http://archive.stsci.edu/hlsps/hlf

A script (hlsp_hlf_v2.0-v2.5_download.txt) is provided which uses the command line tool curl to download the entire dataset or can be edited to download only the files needed.

Zeropoints

The pixel values of the science images report the flux count rate calibrated in electron/second. The zero points to convert the count rate into an AB magnitude for five ACS/WFC passbands and the five WFC3/IR passbands are the following:

Filter Zero Point ABMAG
WFC3/UV
F225W 24.04
F275W 24.13
F336W 24.67
ACS/WFC
F435W 25.68
F606W 26.51
F775W 25.69
F814W 25.94
F850LP 24.87
WFC3/IR
F098M 25.68
F105W 26.27
F125W 26.23
F140W 26.45
F160W 25.94

Catalog

Catalogs are provided for the 13 HST bandpasses in the HLF-GOODS-S, including three WFC3/UV (F225W, F275W and F336W) filters, five ACS filters (F435W, F606W, F775W, F814W and F850LP) and five WFC3 filters (F098M, F105W, F125W, F140W and F160W). We use an ultra-deep detection image that combines the PSF-homogenized, noise-equalized F850LP, F125W, F140W and F160W mosaics. Photometry is extracted in 0.7′′ diameter apertures and corrected to total fluxes based on the F160W curve of growth. The photometric catalog includes 103,098 objects, with a suggested first selection based either (1) “use f160w”, which selects galaxies with S/N>3 in F160W and coverage in 5 HST bandpasses, or (2) “use f850lp”, which selects galaxies covering a wider on-sky area by requiring S/N>3 in F850LP but no minimum coverage of HST bandpasses.

Update [5/28/2020]: The HLF-GOODS-S photometric catalog has been updated from v2.0 to v2.1. The only change is to reduce the relative weight threshold from 1% to 0.01%, as three filters with a combination of extremely deep and shallow pointings (e.g., F606W, F775W, and F850LP) had fluxes for about 50k-67k objects changed to -99 that may still be reliable. This increases the estimated area for F850LP coverage from 343 arcmin2 to 525 arcmin2 and could therefore be important for the shallow imaging coverage in these particular filters. Note that the only figure that slightly changes is the number counts comparison of F850LP (Figure 16), all other figures yield identical measurements to those presented in the publication.

Using the most up-to-date version v2.1 is recommended, though the catalog is largely unchanged.

Please cite Whitaker et al. 2019, ApJS, 244, 16

Convolved images and detection image used to create the V2.1 catalog can be found here: http://archive.stsci.edu/hlsps/hlf/v2.0/60mas_conv

Type Catalog
HLF-GOODS-S Field - WFC3/UV, ACS/WFC & WFC3/IR
ASCII hlsp_hlf_hst_goodss_v2.1_catalog.txt
FITS hlsp_hlf_hst_goodss_v2.1_catalog.fits

HLF Team

The HLF Team is The HLF Team is Garth Illingworth, Daniel Magee, Rychard Bouwens, Pascal Oesch, Kate Whitaker, Ivo Labbe, Pieter van Dokkum, Mauro Stefanon, Bradford Holden, Marijn Franx, and Valentino Gonzalez.

Citation

The description of the Hubble Legacy Fields high level science products delivered to MAST will be published. Please reference Illingworth, Magee, Bouwens, Oesch et al, 2019 and Whitaker, Ashas, Illingworth, Magee et al, 2019. If you use any of the HLF-GOODS-S UV data, please also cite Teplitz et al. 2013 and Rafelski et al. 2015.