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Mission Overview

Reionization Lensing Cluster Survey (RELICS)

 

Primary Investigator: Dan Coe

HLSP Authors: Dan Coe

Released: 2016-08-18

Updated: 2022-09-30

Primary Reference(s): Coe et al. 2018 , Coe et al. 2020

DOI: 10.17909/T9SP45

Citations:  See ADS Statistics

Read Me | Catalogs | Images | Lens Models

Source Data: GO 14096 (Cycle 23)

 
The most distant lensed arc known, SPT0615-JD at z ~ 10
SPT0615-JD

Galaxy Cluster: SPT-CL J0615-5746 (z=0.972) and Lensed Galaxy: SPT0615-JD (z~10.0, inset image) .

This composite image was created by separate exposures acquired by the ACS/WFC and WFC3/IR instruments on the Hubble Space Telescope. The color results from the different hues assigned to the different filter images (Blue: F606W, Green: F814W, Red: F105W + F125W + F140W + F160W).

RELICS

Overview

RELICS obtained the first HST infrared imaging of 41 massive galaxy clusters to efficiently search for brightly lensed high-redshift galaxies in time for JWST Cycle 1. The clusters include 21 of the 34 most massive known according to Planck. Observations of each cluster were split into two epochs, enabling supernova searches in addition to high-redshift and cluster science.

For each cluster, the team observed to 5-orbit depth with ACS and WFC3/IR. The team obtained 3 orbits of ACS imaging in F435W, F606W, and F814W (minus existing archival imaging) and 2 orbits of WFC3/IR imaging in F105W, F125W, F140W, F160W. Five of the clusters required two WFC3/IR pointings. For the 18 clusters with no existing ACS archival imaging, the team also obtained 3-orbit images of blank parallel fields with WFC3/IR F105W, F125W, F140W, F160W (2 orbits) and WFC3/UVIS F350LP (1 orbit) to search for additional high-redshift candidates as in the BoRG and HIPPIES surveys.

In addition to the 188-orbit Hubble Treasury Program 14096 (PI Coe, STScI), the team also obtained 945 hours of Spitzer imaging. The team observed all RELICS clusters as needed to achieve 5-hour depth in two bands with Spitzer GO program 12005 (PI Maruša Bradač, UC Davis) and Spitzer DDT program 12123 (PI Tom Soifer, Caltech). Subsequently, the team obtained 30-hour depth Spitzer imaging for 10 RELICS clusters with DDT 13165, DDT 13210, and GO 14017 (PI Bradač).

Acknowledgment

When using RELICS HST data, please include this acknowledgment: "This work is based on observations taken by the RELICS Treasury Program (GO 14096) with the NASA/ESA HST, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555."

Data Products

Each cluster contains images, catalogs, three-color images, and lens models organized into subdirectories. For more details, see the "Images",  "Catalogs", and "Lens Models" README files at the top of this page. The color images were produced using Trilogy

 

The catalog and colored image products have the following file name convention:
​ hlsp_relics_hst_<instrument>_<cluster>_multi_<version>_<filetype>.<ext> 

where:

  • <instrument> is the instrument name, either "acs", "acs-wfc3ir" or "wfc3ir".
  • <cluster> is a cluster name such as "whl0137-08" and "rxc0232-44". 
  • <version> is the version number such as "v1" and "v2".
  • <filetype> is filetype, such as "color", "cat", and "segm". 
  • <ext> is the extension (".fits" or ".txt").

Data file types:

_cat.txt

Catalog of sources, using either combinedWFC3/IR or just WFC3/IR images and SExtractor.

_color.fits

Three-color image, consult the _color-readme.txt file for specific filters used in the three channels of the color image.

_color.png PNG version of the three-color image.
_color-readme.txt

Readme file for specific filters used in the color image.

_probs.txt

Bayesian probabilities for a given redshift for each target. Each row contains the target's ID, followed by the Bayesian probabilities for redshifts between 0.01 and 13.000, in steps of δz = 0.001

_segm.fits

SExtractor segmentation maps.

 

The image products have the following file name convention:
​ hlsp_relics_hst_<instrument-resolution>_<cluster>_<filter>_<version>_<filetype>.<ext> 

where:

  • <instrument-resolution> refers the combination of instrument and image resolution (e.g., "wfc31r-30mas"). 
    • Instrument is one of "acs", "acs-wfc3", "wfc3ir", or "wfc3uvis".
    • Resolution is either at "30mas" or "60mas".
  • <cluster> is the cluster name (e.g., "whl0137-08") or blank parallel field associated with the cluster (e.g., "whl0137-08-par").
  • <filter> is the filter name for each instrument.
    • ACS: "f435w", "f606w", or "f814w"
    • WFC3/IR: "f105"w, "f125w", "f140w", or "f160w"
    • WFC3/UVIS: "f350lp"
  • <version> is the version number: "v1" or "v2".
  • <filetype> is filetype ("drc", "drz", "rms", or "wht" ).
  • <ext> is the extension (".fits" or ".txt").

Data file types:

_drc.fits

CTE (Charge Transfer Efficiency) corrected, drizzled image.

_drz.fits

Drizzled image.

_rms.fits

Root-mean-squares map.

_wht.fits

Weight map.

 

The model products have the following file naming convention:
​ hlsp_relics_model_model_<cluster>_<lens-model>_<version>_<filetype>.<ext> 

Where:

  • <cluster> is the cluster name, for example, "smacs0723-73".
  • <lens-model> is the lens-model ("glafic", "lenstool", "wslap", or "zitrin-ltm-gauss")
  • <version> is the version number, "v1" or "v2"
  • <filetype> is the filetype such as "gamma", "z01-magnif", and "y-arcsec-deflect". There are many more filetypes. See the detailed file type description table below.
  • <ext> is the file extension ("fits" or "txt")

Data file types:

_gamma1.fits

Shear component 1.

_gamma1-1sigma{err,high,low}.fits

1-sigma error, higher and lower limit map for gamma 1 component.

_gamma2.fits

Shear component 2.

_gamma2-1sigma{err,high,low}.fits

1-sigma error, higher and lower limit map for gamma 2 component.

_gamma.fits

Shear.

_gamma-1sigma{err,high,low}.fits

1-sigma error, higher and lower limit map for gamma.

_kappa.fits

Mass surface density ("convergence").

_kappa-1sigma{err,high,low}.fits

1-sigma error, higher and lower limit map for kappa

_params.txt

An error file containing the best fit and 1-sigma errors for the parameter values.

_psi.fits Lensing potential.
_readme.txt Readme file for the lens model products.

_{x,y}-arcsec-deflect.fits

Best-fit deflection angle maps (x and y component in arcseconds).

_{x,y}-pixels-deflect.fits

Best-fit deflection maps (x and y component in pixels).

_magnif.fits

Best-fit magnification map.

_magnif-1sigma{error,high,low}.fits

1-sigma error map for the above magnification map.

_z{value}-magnif.fits

Best-fit magnification map of the lensed galaxy at redshift, z = value 

 

 

Data Access

Links in the  "Images", "Catalogs", and "Lens Models" columns below take you to the files. Links in the "Color Images" column take you to the fits files with preview images, and README describing which filters went into the color images.
 

Cluster Name Redshift Observed Field Images Color Images Catalogs Lens Models
A1300 0.308 Cluster Core
30mas 60mas
Color Images
Catalogs
 
A1300 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
A1758a 0.280 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A1763 0.228 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A1763 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
A2163 0.203 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A2537 0.297 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A2813 0.292 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A2813 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
A3192 0.425 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A520 0.203 Cluster Core
30mas 60mas
Color Images
Catalogs
 
A665 0.182 Cluster Core
30mas 60mas
Color Images
Catalogs
 
A665 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
A697 0.282 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
A697 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
ACT-CLJ0102-49151 0.870 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
AS295 0.300 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
CLJ0152.7-1357 0.833 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0025.4-1222 0.586 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0035.4-2015 0.352 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0159.8-0849 0.405 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0159.8-0849 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
MACS J0257.1-2325 0.505 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0308.9+2645 0.356 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0417.5-1154 0.443 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MACS J0553.4-3342 0.430 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
MS1008.1-1224 0.306 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
PLCK G004.5-19.5 0.540 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
PLCK G004.5-19.5 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
PLCK G138.61-10.84 0.702 Cluster Core
30mas 60mas
Color Images
Catalogs
 
PLCK G138.61-10.84 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
PLCK G171.9-40.7 0.270 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
PLCK G171.9-40.7 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
PLCK G209.79+10.23 0.677 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
PLCK G209.79+10.23 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
PLCK G287.0+32.9 0.390 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
PLCK G308.3-20.2 0.480 Cluster Core
30mas 60mas
Color Images
Catalogs
 
PLCK G308.3-20.2 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXC J0018.5+1626 0.546 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0032.1+1808 0.396 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0142.9+4438 0.341 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0142.9+4438 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXC J0232.2-4420 0.284 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0232.2-4420 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXC J0600.1-2007 0.460 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0600.1-2007 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXC J0911.1+1746 0.505 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J0949.8+1707 0.383 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J1514.9-1523 0.223 Cluster Core
30mas 60mas
Color Images
Catalogs
 
RXC J1514.9-1523 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXC J2211.7-0350 0.397 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXC J2211.7-0350 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
RXS J060313.4+4212 N 0.228 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
RXS J060313.4+4212 S 0.228 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
SMACS J0723.3-7327 0.390 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
SPT-CLJ0254-5857 0.438 Cluster Core
30mas 60mas
Color Images
Catalogs
 
SPT-CLJ0254-5857 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 
SPT-CLJ0615-5746 0.972 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
WHL J24.3324-8.477 0.566 Cluster Core
30mas 60mas
Color Images
Catalogs
Lens Models
WHL J24.3324-8.477 N/A Parallel Field
30mas 60mas
Color Images
Catalogs
 

 

Citations

Please remember to cite the appropriate paper(s) below and the DOI if you use these data in a published work. 

Note: These HLSP data products are licensed for use under CC BY 4.0.

References