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): Cerny et al. 2018 , Salmon et al. 2020
DOI: 10.17909/T9SP45
Citations: See ADS Statistics
Read Me | Catalogs | Images | Lens Models
Source Data: GO 14096 (Cycle 23)
Slideshow
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 detected by Planck , with measured redshifts from the Russian-Turkish 1.5m Telescope. 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 "macs0308p26 (macs0308+26), and "rxc0232m44" (rxc023-44), where 'p' and 'm' represent '+' and '-' in the cluster names respectively.
- <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., "whl0137m08") or blank parallel field associated with the cluster (e.g., "whl0137m08-par").
- <filter> is the filter name for each instrument.
- ACS: "f435w", "f555w", "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, "smacs0723m73".
- <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
Catalogs, color images, and monochrome images are available in the MAST Portal and astroquery. Set the 'Provenance Name' filter to RELICS in the Portal Advanced Search to match all observations. The observations can also be retrieved programmatically using the astroquery.mast module. The code example below retrieves all products and allows you to download them via a bash script. Note: total file size is in excess of 600 GB.
from astroquery.mast import Observations
all_obs = Observations.query_criteria(provenance_name="relics")
data_products = Observations.get_product_list(all_obs)
Observations.download_products(data_products, curl_flag=True)
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A web-based interface for cross-mission searches of data at MAST or the Virtual Observatory
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Search for and retrieve 3D-DASH data products programmatically.
MAST also provides direct downloads of all RELICS products. Lens Model products are only available via direct downloads. 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 | |||||
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A1300 | 0.308 | Cluster Core |
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A1300 | N/A | Parallel Field |
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A1758a | 0.280 | Cluster Core |
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A1763 | 0.228 | Cluster Core |
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A1763 | N/A | Parallel Field |
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A2163 | 0.203 | Cluster Core |
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A2537 | 0.297 | Cluster Core |
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A2813 | 0.292 | Cluster Core |
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A2813 | N/A | Parallel Field |
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A3192 | 0.425 | Cluster Core |
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A520 | 0.203 | Cluster Core |
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A665 | 0.182 | Cluster Core |
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A665 | N/A | Parallel Field |
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A697 | 0.282 | Cluster Core |
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A697 | N/A | Parallel Field |
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ACT-CLJ0102-49151 | 0.870 | Cluster Core |
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AS295 | 0.300 | Cluster Core |
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CLJ0152.7-1357 | 0.833 | Cluster Core |
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MACS J0025.4-1222 | 0.586 | Cluster Core |
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MACS J0035.4-2015 | 0.352 | Cluster Core |
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MACS J0159.8-0849 | 0.405 | Cluster Core |
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MACS J0159.8-0849 | N/A | Parallel Field |
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MACS J0257.1-2325 | 0.505 | Cluster Core |
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MACS J0308.9+2645 | 0.356 | Cluster Core |
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MACS J0417.5-1154 | 0.443 | Cluster Core |
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MACS J0553.4-3342 | 0.430 | Cluster Core |
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MS1008.1-1224 | 0.306 | Cluster Core |
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PLCK G004.5-19.5 | 0.540 | Cluster Core |
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PLCK G004.5-19.5 | N/A | Parallel Field |
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PLCK G138.61-10.84 | 0.702 | Cluster Core |
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PLCK G138.61-10.84 | N/A | Parallel Field |
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PLCK G171.9-40.7 | 0.270 | Cluster Core |
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PLCK G171.9-40.7 | N/A | Parallel Field |
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PLCK G209.79+10.23 | 0.677 | Cluster Core |
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PLCK G209.79+10.23 | N/A | Parallel Field |
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PLCK G287.0+32.9 | 0.390 | Cluster Core |
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PLCK G308.3-20.2 | 0.480 | Cluster Core |
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PLCK G308.3-20.2 | N/A | Parallel Field |
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RXC J0018.5+1626 | 0.546 | Cluster Core |
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RXC J0032.1+1808 | 0.396 | Cluster Core |
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RXC J0142.9+4438 | 0.341 | Cluster Core |
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RXC J0142.9+4438 | N/A | Parallel Field |
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RXC J0232.2-4420 | 0.284 | Cluster Core |
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RXC J0232.2-4420 | N/A | Parallel Field |
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RXC J0600.1-2007 | 0.460 | Cluster Core |
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RXC J0600.1-2007 | N/A | Parallel Field |
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RXC J0911.1+1746 | 0.505 | Cluster Core |
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RXC J0949.8+1707 | 0.383 | Cluster Core |
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RXC J1514.9-1523 | 0.223 | Cluster Core |
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RXC J1514.9-1523 | N/A | Parallel Field |
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RXC J2211.7-0350 | 0.397 | Cluster Core |
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RXC J2211.7-0350 | N/A | Parallel Field |
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RXS J060313.4+4212 N | 0.228 | Cluster Core |
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RXS J060313.4+4212 S | 0.228 | Cluster Core |
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SMACS J0723.3-7327 | 0.390 | Cluster Core |
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SPT-CLJ0254-5857 | 0.438 | Cluster Core |
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SPT-CLJ0254-5857 | N/A | Parallel Field |
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SPT-CLJ0615-5746 | 0.972 | Cluster Core |
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WHL J24.3324-8.477 | 0.566 | Cluster Core |
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WHL J24.3324-8.477 | N/A | Parallel Field |
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