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首页> 外文期刊>The Astrophysical Journal. Supplement Series >The Spitzer-HETDEX Exploratory Large Area Survey. II. The Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog
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The Spitzer-HETDEX Exploratory Large Area Survey. II. The Dark Energy Camera and Spitzer/IRAC Multiwavelength Catalog

机译：Spitzer-Hetdex探索性大面积调查。 II。 黑暗能量相机和Spitzer / IRAC多波长目录

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摘要

We present the ugriz-band Dark Energy Camera (DECam) plus 3.6 and 4.5 mu m IRAC catalogs for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers similar to 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 mu m. SHELA falls within the footprint of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), which will provide spectroscopic redshifts for similar to 200,000 Ly alpha emitters at 1.9 < z < 3.5 and also for similar to 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 5 sigma depth of similar to 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 mu m 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 z) = 0.33 SDSS spectroscopic redshifts with a 1 sigma scatter in Delta z/(1 + z) of 0.04.
机译：我们介绍了UGRIZ带暗能量相机（碳粉屑）加3.6和4.5亩IRAC目录，用于Spitzer / Hetdex探索大区域（Shela）调查。 Shela封面类似于24°Deg（2）的Sloan数字天空测量（SDSS）“条纹82”区域，七个带通跨越0.35至4.5μm的波长范围。 Shela落在业余爱好的望远镜暗能实验（Hetdex）的脚印内，这将提供与1.9

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