The Spitzer–HETDEX Exploratory Large-Area Survey. IV. Model-based Multiwavelength Photometric Catalog
The Spitzer–HETDEX Exploratory Large-Area Survey. IV. Model-based Multiwavelength Photometric Catalog
复制标题
DOI：
10.3847/1538-4365/acfe78
复制
发表时间：
2023-01
期刊：
影响因子：
--
通讯作者：
G. Leung;S. Finkelstein;J. Weaver;C. Papovich;R. Larson;Katherine Chworowsky;R. Ciardullo;E. Gawiser;C. Gronwall;S. Jogee;L. Kawinwanichakij;R. Somerville;I. Wold;L. Y. Aaron Yung
中科院分区：
文献类型：
--
作者：
G. Leung;S. Finkelstein;J. Weaver;C. Papovich;R. Larson;Katherine Chworowsky;R. Ciardullo;E. Gawiser;C. Gronwall;S. Jogee;L. Kawinwanichakij;R. Somerville;I. Wold;L. Y. Aaron Yung
我们为 Spitzer/HETDEX 探索性大面积 (SHELA) 巡天提供了 0.3–4.5 μm 16 波段光度目录。 SHELA 覆盖了霍比-埃伯利望远镜暗能量实验 (HETDEX) 范围内约 27 deg2 的区域。在这里，我们展示了新的 DECam 成像和使用完全基于模型的方法提取的 400 万个源的 rizK 波段选择目录。我们通过与基于模型的 DECam Legacy Survey 进行比较来验证我们的光度测量。通过与之前的 SHELA 目录进行比较，我们分析了基于模型的光度测量和孔径光度测量之间的差异，发现我们的基于模型的光度测量可以测量点源到较微弱的通量，并更好地捕获解析源的全部发射。该目录在 riz ∼ 24.7 (25.1) AB mag 处完成了 80% (50%)，并且光学光度测量达到了 ∼25.5 AB mag 的 5σ 深度。我们测量光度红移，并在 0 ≤ z ≤ 1 的可用光谱红移下实现 1σ 散射 Δz/(1 + z) 为 0.04。这个大面积、多波长光度目录与 HETDEX 的光谱信息相结合，将使广泛的河外科学调查成为可能。
We present a 0.3–4.5 μm 16-band photometric catalog for the Spitzer/HETDEX Exploratory Large-Area (SHELA) survey. SHELA covers an ∼27 deg2 field within the footprint of the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX). Here we present new DECam imaging and an rizK s band–selected catalog of four million sources extracted using a fully model-based approach. We validate our photometry by comparing with the model-based DECam Legacy Survey. We analyze the differences between model-based and aperture photometry by comparing with the previous SHELA catalog, finding that our model-based photometry can measure point sources to fainter fluxes and better capture the full emission of resolved sources. The catalog is 80% (50%) complete at riz ∼ 24.7 (25.1) AB mag, and the optical photometry reaches a 5σ depth of ∼25.5 AB mag. We measure photometric redshifts and achieve a 1σ scatter of Δz/(1 + z) of 0.04 with available spectroscopic redshifts at 0 ≤ z ≤ 1. This large-area, multiwavelength photometric catalog, combined with spectroscopic information from HETDEX, will enable a wide range of extragalactic science investigations.