The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog

Isak G.B. Wold, Lalitwadee Kawinwanichakij, Matthew L. Stevans, Steven L. Finkelstein, Casey Papovich, Yaswant Devarakonda, Robin Ciardullo, John Feldmeier, Jonathan Florez, Eric Gawiser, Caryl Gronwall, Shardha Jogee, Jennifer L. Marshall, Sydney Sherman, Heath V. Shipley, Rachel S. Somerville, Francisco Valdes, Gregory R. Zeimann

Research output: Contribution to journalArticle

Abstract

We present the ugriz-band Dark Energy Camera (DECam) plus 3.6 and 4.5 μm IRAC catalogs for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers ∼24 deg 2 of the Sloan Digital Sky Survey (SDSS) "Stripe 82" region, with seven bandpasses spanning a wavelength range of 0.35 to 4.5 μm. SHELA falls within the footprint of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), which will provide spectroscopic redshifts for ∼200,000 Lyα emitters at 1.9 < z < 3.5 and also for ∼200,000 [O ii] emitters at z < 0.5. SHELA's deep, wide-area multiwavelength images, combined with HETDEX's spectroscopic information, will facilitate many extragalactic studies, including measuring the evolution of galaxy stellar mass, halo mass, and environment from 1.5 < z < 3.5. Here we present riz-band-selected ugriz-band DECam catalogs that reach a 5σ depth of ∼24.5 AB mag (for point sources with an aperture that encloses 70% of the total flux) and cover 17.5 deg 2 of the overall SHELA field. We validate our DECam catalog by comparison to the DECam Legacy Survey (DECaLS) DR5 and the Dark Energy Survey (DES) DR1. We perform IRAC forced photometry with The Tractor image modeling code to measure 3.6 and 4.5 μm fluxes for all objects within our DECam catalog. We demonstrate the utility of our catalog by computing galaxy number counts and estimating photometric redshifts. Our photometric redshifts recover the available SDSS spectroscopic redshifts with a 1σ scatter in Δz/(1 + z) of 0.04.

Original languageEnglish (US)
Article number5
JournalAstrophysical Journal, Supplement Series
Volume240
Issue number1
DOIs
StatePublished - Jan 2019

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dark energy
catalogs
cameras
telescopes
energy
experiment
emitters
tractors
galaxies
footprints
stellar mass
footprint
point sources
point source
photometry
halos
estimating
apertures
wavelength
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Wold, I. G. B., Kawinwanichakij, L., Stevans, M. L., Finkelstein, S. L., Papovich, C., Devarakonda, Y., ... Zeimann, G. R. (2019). The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog. Astrophysical Journal, Supplement Series, 240(1), [5]. https://doi.org/10.3847/1538-4365/aaee85
Wold, Isak G.B. ; Kawinwanichakij, Lalitwadee ; Stevans, Matthew L. ; Finkelstein, Steven L. ; Papovich, Casey ; Devarakonda, Yaswant ; Ciardullo, Robin ; Feldmeier, John ; Florez, Jonathan ; Gawiser, Eric ; Gronwall, Caryl ; Jogee, Shardha ; Marshall, Jennifer L. ; Sherman, Sydney ; Shipley, Heath V. ; Somerville, Rachel S. ; Valdes, Francisco ; Zeimann, Gregory R. / The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog. In: Astrophysical Journal, Supplement Series. 2019 ; Vol. 240, No. 1.
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abstract = "We present the ugriz-band Dark Energy Camera (DECam) plus 3.6 and 4.5 μm IRAC catalogs for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers ∼24 deg 2 of the Sloan Digital Sky Survey (SDSS) {"}Stripe 82{"} region, with seven bandpasses spanning a wavelength range of 0.35 to 4.5 μm. SHELA falls within the footprint of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), which will provide spectroscopic redshifts for ∼200,000 Lyα emitters at 1.9 < z < 3.5 and also for ∼200,000 [O ii] emitters at z < 0.5. SHELA's deep, wide-area multiwavelength images, combined with HETDEX's spectroscopic information, will facilitate many extragalactic studies, including measuring the evolution of galaxy stellar mass, halo mass, and environment from 1.5 < z < 3.5. Here we present riz-band-selected ugriz-band DECam catalogs that reach a 5σ depth of ∼24.5 AB mag (for point sources with an aperture that encloses 70{\%} of the total flux) and cover 17.5 deg 2 of the overall SHELA field. We validate our DECam catalog by comparison to the DECam Legacy Survey (DECaLS) DR5 and the Dark Energy Survey (DES) DR1. We perform IRAC forced photometry with The Tractor image modeling code to measure 3.6 and 4.5 μm fluxes for all objects within our DECam catalog. We demonstrate the utility of our catalog by computing galaxy number counts and estimating photometric redshifts. Our photometric redshifts recover the available SDSS spectroscopic redshifts with a 1σ scatter in Δz/(1 + z) of 0.04.",
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Wold, IGB, Kawinwanichakij, L, Stevans, ML, Finkelstein, SL, Papovich, C, Devarakonda, Y, Ciardullo, R, Feldmeier, J, Florez, J, Gawiser, E, Gronwall, C, Jogee, S, Marshall, JL, Sherman, S, Shipley, HV, Somerville, RS, Valdes, F & Zeimann, GR 2019, 'The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog', Astrophysical Journal, Supplement Series, vol. 240, no. 1, 5. https://doi.org/10.3847/1538-4365/aaee85

The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog. / Wold, Isak G.B.; Kawinwanichakij, Lalitwadee; Stevans, Matthew L.; Finkelstein, Steven L.; Papovich, Casey; Devarakonda, Yaswant; Ciardullo, Robin; Feldmeier, John; Florez, Jonathan; Gawiser, Eric; Gronwall, Caryl; Jogee, Shardha; Marshall, Jennifer L.; Sherman, Sydney; Shipley, Heath V.; Somerville, Rachel S.; Valdes, Francisco; Zeimann, Gregory R.

In: Astrophysical Journal, Supplement Series, Vol. 240, No. 1, 5, 01.2019.

Research output: Contribution to journalArticle

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T1 - The Spitzer-HETDEX Exploratory Large Area Survey. II. the Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog

AU - Wold, Isak G.B.

AU - Kawinwanichakij, Lalitwadee

AU - Stevans, Matthew L.

AU - Finkelstein, Steven L.

AU - Papovich, Casey

AU - Devarakonda, Yaswant

AU - Ciardullo, Robin

AU - Feldmeier, John

AU - Florez, Jonathan

AU - Gawiser, Eric

AU - Gronwall, Caryl

AU - Jogee, Shardha

AU - Marshall, Jennifer L.

AU - Sherman, Sydney

AU - Shipley, Heath V.

AU - Somerville, Rachel S.

AU - Valdes, Francisco

AU - Zeimann, Gregory R.

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