TEMPLATES

Targeting Extremely Magnified Panchromatic Lensed Arcs and their Extended Star formation (TEMPLATES)

Primary Investigator: Jane Rigby, Joaquin Vieira

HLSP Authors: Keren Sharon, Justin Spilker, Michael Florian, Jane Rigby

Released: 2022-10-05

Updated: 2022-10-05

Primary Reference(s): Sharon et al. 2022

DOI: 10.17909/zqax-2y86

Citations: See ADS Statistics

Read Me

Source Data:

TEMPLATES Proposal

alternate — TEMPLATES will obtain JWST spectra of four gravitationally lensed galaxies. The pictures show these galaxies as seen by HST/ALMA.

Overview

The TEMPLATES program is designed to obtain high signal-to-noise NIRSpec and MIRI IFU spectroscopy, with accompanying imaging, for 4 gravitationally lensed galaxies at 1<z<4. This program aims to spatially resolve the star formation in galaxies across the peak of cosmic star formation, in an extinction-robust manner. Lensing magnification pushes JWST to the highest spatial resolutions possible at these redshifts, to map the key spectral diagnostics of star formation and dust extinction: H-alpha, Pa-alpha, and 3.3um PAH within individual distant galaxies. The targets are among the brightest, best-characterized lensed systems known, and span a wide range of specific star formation rate, extinction, and luminosity. They have extensive ancillary datasets. The TEMPLATES science goals are: 1) demonstrate extinction-robust star formation rate diagnostics for distant galaxies; 2) determine the physical scales of star formation in distant galaxies, in an extinction-robust way; 3) measure specific star formation rates and compare the spatial distribution of the young and old stars; and 4) measure the physical conditions of star formation and their spatial variation.

This program uses key instrument modes, heavily exercising the NIRSpec and MIRI IFUs. The resulting science-enabling data products demonstrate JWST’s capabilities and provide the extragalactic science community with rich datasets. In four deliveries, the team will provide high-quality Level 3 data cubes and mosaics, empirical star formation diagnostics, maps of star formation, extinction, and physical properties, a tool for comparing NIRSpec and MIRI data cubes, and cookbooks on data reduction, analysis, and calibration strategy.

The high level science products (HLSPs) will be released in several steps:

Early release:
- Delivery 1: Existing lens models; high-level HST, Spitzer, and ALMA data
- Delivery 1a: Simulated raw and science-ready JWST data; pipeline cookbook; improved lens models
Post launch releases:
- Delivery 2: L+10 months. Level 3 data products and cookbooks; plot of SNR versus surface brightness for IFUs
- Delivery 3: L+13 months. High-level science products: maps of H alpha, emission line ratios, extinction, source-plane reconstructions, SED fits
- Delivery 4: L+19 months. Clean-up delivery of improved data products

Data Products

All TEMPLATES files are organized into directories with the following structure:

<target>/<product>

where:

<target> is the target name, one of "sdssj1226p2152", "sdssJ1723p3411", "spt0418-47" or "spt2147-50".
<product> is the product type, one of "hst", "spitzer", "alma" or "lens_models".

HST Data

Image mosaics for each target from HST are named according to the following convention:

hlsp_templates_hst_<inst>_<target>_<filter>_v1_<type>.fits

where:

<inst> is the instrument, one of "acs" or "wfc3".
<target> is the target name.
<filter> is the filter name.
<type> is the type of image file, either science ("drc-sci", "drz-sci"), weight map ("drz-wht"), or PSF ("psf").

Data file types:

_drc-sci.fits	Drizzled HST science image
_drc-sci.fits	Drizzled HST science image with charge transfer efficiency correction
_drz-wht.fits	Drizzled HST weight image
_psf.fits	HST point spread function (PSF) file

Spitzer Data

Image mosaics from Spitzer for SDSS J1226+2152 and SDSS J1723+3411 are grouped into folders named by the IRAC channel ("irac_ch1/" and "irac_ch2/") and named according to the following convention:

hlsp_templates_spitzer_irac_<target>_<channel>_v1_<type>.fits

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<channel> is the Spitzer/IRAC channel name, one of "ch1" or "ch2".
<type> is the type of image file, one of "mosaic", "mosaic-unc" or "mosaic-cov".

Data file types:

-mosaic.fits	Outlier-rejected mosaicked Spitzer image
-mosaic-cov.fits	Coverage depth — number of good Spitzer exposures that were used in each pixel
-mosaic-unc.fits	One sigma uncertainty on the Spitzer image

ALMA Data

Dust continuum images from ALMA are named according to the following convention:

hlsp_templates_alma_alma_<target>_<wavelength>_v1_cont-<resolution>-image.fits

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<wavelength> is the rest wavelength.
<resolution> is the resolution of the synthesized beam.

Data file types:

-image.fits	ALMA dust continuum image without primary beam correction
-image-pbcor.fits	ALMA dust continuum image with primary beam correction

Lens Models

Expand the box below for information about lens model files:

Each lens model directory contains a README file with the following naming convention:

hlsp_templates_hst_multi_<target>_multi_v1_readme.txt

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".

Lens model files are named according to the following convention:

hlsp_templates_hst_multi_<target>_multi_v1_<model_version>-<type>-<fit_version>.fits

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<model_version> is the version of the lens model, one of "v0" or "v1".
<type> is the type of model file, one of "dplx", "dply" or "magnific".
<fit_version> is the version of the model fit, where "1" is the best fit. The best fit ("1") is provided in the main lens model directory, and additional fits are provided in the "range" directory, see below for more information.

In each lens model directory, an image with matching world coordinate system (WCS) to the lens model files is also provided, and is named according to the following convention:

hlsp_templates_hst_<inst>_<target>_<filter>_v1_drc-sci-cat-matched.fits

where:

<inst> is the instrument name, one of "acs" or "wfc3".
<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<filter> is the filter name.

In addition to the best-fit model files, a directory titled "range" contains a tar bundle of lens model files for all fit version (including versions 1-102), and is named according to the following convention:

hlsp_templates_hst_multi_<target>_multi_v1_<model_version>-archive.tar.gz

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<model_version> is the version of the lens model, one of "v0" or "v1".

In addition, a text file in the range directory is provided to link the fit version to the Bayesian sampling scheme, and is named according to the following convention:

hlsp_templates_hst_multi_<target>_multi_v1_<model_version>-bayes-map.txt

where:

<target> is the target name, one of "sdssj1226p2152" or "sdssJ1723p3411".
<model_version> is the version of the lens model, one of "v0" or "v1".

Data file types:

_readme.txt	README file
-cat-matched.fits	Image with matching WCS to lens model
-dplx-<fit_version>.fits	Deflection in x direction
-dply-<fit_version>.fits	Deflection in y direction
-magnific-<fit_version>.fits	Magnification
-archive.tar.gz	Bundle of additional lens model fit files
-bayes-map.txt	Text description of Bayesian model sampling

Data Access

Individual data files can be accessed from https://archive.stsci.edu/hlsps/templates/. cURL scripts for downloading groups of files, organized by target, are linked in the tables below. These tables also include pertinent citation information for each dataset.

SDSS J1226+2152
Source	Files	Citation
HST	All images (F606W, F814W, F110W, F140W, F160W)	Sharon et al. 2022
Spitzer	All images (Channel 1, Channel 2)	Florian et al. 2021
Lens Model Files	Version 0	Tejos et al. 2021
Lens Model Files	Version 1	Sharon et al. 2022

SDSS J1723+3411
Source	Files	Citation
HST	All images (F110W, F160W, F390W, F775W)	Sharon et al. 2020, Florian et al. 2021
Spitzer	All images (Channel 1, Channel 2)	Florian et al. 2021
Lens Model Files	Version 1	Sharon et al. 2020, Florian et al. 2021

SPT 0418-47
Source	Files	Citation
HST	All images (F140W)	J. Ma et al. 2015
ALMA	All images (120um, 160um, 380um)	Spilker et al. 2016

SPT 2147-50
Source	Files	Citation
HST	All images (F140W)	J. Ma et al. 2015
ALMA	All images (160um, 300um, 380um, 450um)	Spilker et al. 2016

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.

TEMPLATES

Mission Overview

Targeting Extremely Magnified Panchromatic Lensed Arcs and their Extended Star formation (TEMPLATES)

Overview

Data Products

HST Data

Spitzer Data

ALMA Data

Lens Models

Data Access

Citations

References