Daniel Masters
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View article: COSMOS Spectroscopic Redshift Compilation (First Data Release): 488,000 Redshifts Encompassing Two Decades of Spectroscopy
COSMOS Spectroscopic Redshift Compilation (First Data Release): 488,000 Redshifts Encompassing Two Decades of Spectroscopy Open
We present the COSMOS Spectroscopic Redshift Compilation encompassing ∼20 yr of spectroscopic redshifts within a 10 deg 2 area centered on the 2 deg 2 COSMOS legacy field. This compilation contains 487,666 redshifts of 266,284 unique objec…
View article: Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview
Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE): Survey Overview Open
During the second half of Cycle 1 of the James Webb Space Telescope (JWST), we conducted the Parallel Application of Slitless Spectroscopy to Analyze Galaxy Evolution (PASSAGE) program. PASSAGE received the largest allocation of JWST obser…
View article: The SPHEREx Sky Simulator: Science Data Modeling for the First All-sky Near-infrared Spectral Survey
The SPHEREx Sky Simulator: Science Data Modeling for the First All-sky Near-infrared Spectral Survey Open
We describe the SPHEREx Sky Simulator (henceforth the Simulator), a software tool designed to model science data for NASA’s SPHEREx mission that will carry out a series of all-sky spectrophotometric surveys at ∼6″ spatial resolution in 102…
View article: The Potential of the SPHEREx Mission for Characterizing Polycyclic Aromatic Hydrocarbon 3.3 <i>μ</i>m Emission in Nearby Galaxies
The Potential of the SPHEREx Mission for Characterizing Polycyclic Aromatic Hydrocarbon 3.3 <i>μ</i>m Emission in Nearby Galaxies Open
Together with gas, stars, and supermassive black holes, dust is crucial in stellar and galaxy evolution. Hence, understanding galaxies’ dust properties across cosmic time is critical to studying their evolution. In addition to photometric …
View article: Simulating Spectral Confusion in SPHEREx Photometry and Redshifts
Simulating Spectral Confusion in SPHEREx Photometry and Redshifts Open
We model the impact of source confusion on photometry and the resulting spectrophotometric redshifts for SPHEREx, a NASA Medium-Class Explorer that is carrying out an all-sky near-infrared spectral survey. Spectral confusion from untargete…
View article: Joint Survey Processing. III. Compact Oddballs in the COSMOS Field—Little Red Dots and Transients
Joint Survey Processing. III. Compact Oddballs in the COSMOS Field—Little Red Dots and Transients Open
We present the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) G800L grism spectroscopy observation of the faint active galactic nuclei (AGN) candidates in the Cosmic Evolution Survey field at redshift of 6 selected by the p…
View article: Euclid Quick Data Release (Q1). From spectrograms to spectra: The SIR spectroscopic processing function
Euclid Quick Data Release (Q1). From spectrograms to spectra: The SIR spectroscopic processing function Open
The Euclid space mission aims to investigate the nature of dark energy and dark matter by mapping the large-scale structure of the Universe. A key component of Euclid's observational strategy is slitless spectroscopy, which is conducted us…
View article: The SPHEREx Sky Simulator: Science Data Modeling for the First All-Sky Near-Infrared Spectral Survey
The SPHEREx Sky Simulator: Science Data Modeling for the First All-Sky Near-Infrared Spectral Survey Open
We describe the SPHEREx Sky Simulator, a software tool designed to model science data for NASA's SPHEREx mission that will carry out a series of all-sky spectrophotometric surveys at $\sim$6'' spatial resolution in 102 spectral channels sp…
View article: The Potential of the SPHEREx Mission for Characterizing Polycyclic Aromatic Hydrocarbon 3.3 μm Emission in Nearby Galaxies
The Potential of the SPHEREx Mission for Characterizing Polycyclic Aromatic Hydrocarbon 3.3 μm Emission in Nearby Galaxies Open
Together with gas, stars, and supermassive black holes, dust is crucial in stellar and galaxy evolution. Hence, understanding galaxies' dust properties across cosmic time is critical to studying their evolution. In addition to photometric …
View article: COSMOS Spectroscopic Redshift Compilation (First Data Release): 488k Redshifts Encompassing Two Decades of Spectroscopy
COSMOS Spectroscopic Redshift Compilation (First Data Release): 488k Redshifts Encompassing Two Decades of Spectroscopy Open
We present the COSMOS Spectroscopic Redshift Compilation encompassing ~ 20 years of spectroscopic redshifts within a 10 deg$^2$ area centered on the 2 deg$^2$ COSMOS legacy field. This compilation contains 487,666 redshifts of 266,284 uniq…
View article: Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps
Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps Open
The ESA Euclid mission will survey more than 14,000 deg$^2$ of the sky in visible and near-infrared wavelengths, mapping the extra-galactic sky to constrain our cosmological model of the Universe. Although the survey focusses on regions fu…
View article: The Universe SPHEREx Will See: Empirically Based Galaxy Simulations and Redshift Predictions
The Universe SPHEREx Will See: Empirically Based Galaxy Simulations and Redshift Predictions Open
We simulate galaxy properties and redshift estimation for SPHEREx, the next NASA Medium Class Explorer. To make robust models of the galaxy population and test the spectrophotometric redshift performance for SPHEREx, we develop a set of sy…
View article: DESI complete calibration of the colour–redshift relation (DC3R2): results from early DESI data
DESI complete calibration of the colour–redshift relation (DC3R2): results from early DESI data Open
We present initial results from the Dark Energy Spectroscopic Instrument (DESI) complete calibration of the colour–redshift relation (DC3R2) secondary target survey. Our analysis uses 230 k galaxies that overlap with KiDS-VIKING ugriZYJHKs…
View article: Predicting the Spectroscopic Features of Galaxies by Applying Manifold Learning on Their Broadband Colors: Proof of Concept and Potential Applications for Euclid, Roman, and Rubin LSST
Predicting the Spectroscopic Features of Galaxies by Applying Manifold Learning on Their Broadband Colors: Proof of Concept and Potential Applications for Euclid, Roman, and Rubin LSST Open
Entering the era of large-scale galaxy surveys, which will deliver unprecedented amounts of photometric and spectroscopic data, there is a growing need for more efficient, data-driven, and less model-dependent techniques to analyze the spe…
View article: WFC3 Infrared Spectroscopic Parallel (WISP) Survey: Photometric and Emission Line Data Release
WFC3 Infrared Spectroscopic Parallel (WISP) Survey: Photometric and Emission Line Data Release Open
We present reduced images and catalogues of photometric and emission line data ($\sim$230,000 and $\sim$8,000 sources, respectively) for the WFC3 Infrared Spectroscopic Parallel (WISP) Survey. These data are made publicly available on the …
View article: A new subjective well-being index using anchored best-worst scaling
A new subjective well-being index using anchored best-worst scaling Open
Subjective well-being (SWB) describes an individual's life evaluation. Direct elicitation methods for SWB via rating scales do not force individuals to trade-off among life domains, whilst best-worst scaling (BWS) approaches only provide r…
View article: WFC3 Infrared Spectroscopic Parallel (WISP) survey: photometric and emission-line data release
WFC3 Infrared Spectroscopic Parallel (WISP) survey: photometric and emission-line data release Open
We present reduced images and catalogues of photometric and emission-line data (∼230 000 and ∼8000 sources, respectively) for the WFC3 (Wide Field Camera 3) Infrared Spectroscopic Parallel (WISP) survey. These data are made publicly availa…
View article: The Universe SPHEREx Will See: Empirically Based Galaxy Simulations and Redshift Predictions
The Universe SPHEREx Will See: Empirically Based Galaxy Simulations and Redshift Predictions Open
We simulate galaxy properties and redshift estimation for SPHEREx, the next NASA Medium Class Explorer. To make robust models of the galaxy population and test spectro-photometric redshift performance for SPHEREx, we develop a set of synth…
View article: Predicting the Spectroscopic Features of Galaxies by Applying Manifold Learning on Their Broad-Band Colors: Proof of Concept and Potential Applications for Euclid, Roman, and Rubin LSST
Predicting the Spectroscopic Features of Galaxies by Applying Manifold Learning on Their Broad-Band Colors: Proof of Concept and Potential Applications for Euclid, Roman, and Rubin LSST Open
Entering the era of large-scale galaxy surveys which will deliver unprecedented amounts of photometric and spectroscopic data, there is a growing need for more efficient, data driven, and less model-dependent techniques to analyze spectral…
View article: The Farmer: A Reproducible Profile-fitting Photometry Package for Deep Galaxy Surveys
The Farmer: A Reproducible Profile-fitting Photometry Package for Deep Galaxy Surveys Open
While space-borne optical and near-infrared facilities have succeeded in delivering a precise and spatially resolved picture of our Universe, their small survey area is known to underrepresent the true diversity of galaxy populations. Grou…
View article: <i>Euclid</i> preparation
<i>Euclid</i> preparation Open
The technique of photometric redshifts has become essential for the exploitation of multi-band extragalactic surveys. While the requirements on photometric redshifts for the study of galaxy evolution mostly pertain to the precision and to …
View article: The Farmer: A reproducible profile-fitting photometry package for deep galaxy surveys
The Farmer: A reproducible profile-fitting photometry package for deep galaxy surveys Open
While space-borne optical and near-infrared facilities have succeeded in delivering a precise and spatially resolved picture of our Universe, their small survey area is known to under-represent the true diversity of galaxy populations. Gro…
View article: DESI Complete Calibration of the Color-Redshift Relation (DC3R2): Results from early DESI data
DESI Complete Calibration of the Color-Redshift Relation (DC3R2): Results from early DESI data Open
The data and python code used to reproduce the figures in the paper of the same name, J. McCullough et al.
View article: Categorizing models using Self-Organizing Maps: an application to modified gravity theories probed by cosmic shear
Categorizing models using Self-Organizing Maps: an application to modified gravity theories probed by cosmic shear Open
We propose to use Self-Organizing Maps (SOM) to map the impact of physical\nmodels onto observables. Using this approach, we are be able to determine how\ntheories relate to each other given their signatures. In cosmology this will be\npar…
View article: The SPHEREx Target List of Ice Sources (SPLICES)
The SPHEREx Target List of Ice Sources (SPLICES) Open
One of the primary objectives of the SPHEREx mission is to understand the origin of molecules such as H 2 O, CO 2 , and other volatile compounds at the early stages of planetary system formation. Because the vast majority of these compound…
View article: A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow?
A Broad-line Quasar with Unexplained Extreme Velocity Offsets: Post-shock Outflow? Open
The quasar SDSS 0956 + 5128 exhibits three distinct velocity components with large offsets in emission: the systemic velocity of [O ii ], [O iii ], and [Ne iii ] narrow lines have redshift z = 0.7142; the broad Mg ii line is shifted by −12…
View article: Astro2020 Science White Paper: Cosmological Synergies Enabled by Joint Analysis of Multi-probe data from WFIRST, Euclid, and LSST
Astro2020 Science White Paper: Cosmological Synergies Enabled by Joint Analysis of Multi-probe data from WFIRST, Euclid, and LSST Open
NASA, NSF, and DOE will collectively spend well over $4B this decade and the next on missions and surveys that have dark energy cosmology as one of their primary drivers. WFIRST, Euclid, and LSST are all missions designed to perform dedica…
View article: A Machine-learning Approach to Predict Missing Flux Densities in Multiband Galaxy Surveys
A Machine-learning Approach to Predict Missing Flux Densities in Multiband Galaxy Surveys Open
We present a new method based on information theory to find the optimal number of bands required to measure the physical properties of galaxies with desired accuracy. As a proof of concept, using the recently updated COSMOS catalog (COSMOS…