欧几里得准备。宇宙黎明巡天：数据发布1 欧几里得深场北和欧几里得深场天炉座的多波段星表
Euclid Preparation. Cosmic Dawn Survey: Data release 1 multiwavelength catalogues for Euclid Deep Field North and Euclid Deep Field Fornax
AI总结：
宇宙黎明巡天发布首个多波段星表，覆盖两个欧几里得深场，结合H20与斯皮策数据，提供测光、红移和恒星质量，验证可靠，支持后续研究。
摘要：
宇宙黎明巡天（DAWN巡天）提供了覆盖欧几里得深场和辅助场（EDFs和EAFs）合计59平方度区域的多波段（紫外/光学到中红外）数据。本文介绍了DAWN巡天首次公开数据发布（DR1）。DR1星表针对整个DAWN巡天的一个子集发布，该子集包含两个欧几里得深场：欧几里得深场北（EDF-N）和欧几里得深场天炉座（EDF-F）。DAWN巡天DR1星表不包含欧几里得数据，因为这些场的数据尚未公开。尽管如此，每个场都已被正在进行的夏威夷二十平方度巡天（H20）覆盖，该巡天包括CFHT MegaCam在新u波段和Subaru Hyper Suprime-Cam（HSC）在griz波段的成像。每个场还进一步被斯皮策/IRAC 3.6-4.5微米成像覆盖，该成像覆盖10平方度，深度达到约25等AB（5σ）。本次发布将所有现有的H20成像以及上述设施所有公开可用的成像与深斯皮策/IRAC数据相结合，生成了覆盖EDF-N总面积为16.87平方度、EDF-F总面积为2.85平方度的源星表。测光使用The Farmer（一种经过充分验证的基于模型的测光代码）进行测量。光度和恒星质量使用两个独立的谱能量分布建模代码计算：EAZY和LePhare。光度红移与光谱红移表现出良好的一致性（在i<25时，σ_NMAD约0.5，η<8%）。源计数、光度红移和恒星质量进一步与COSMOS2020星表比较验证。DAWN巡天DR1星表旨在供这两个EDF直接使用，并将持续更新。未来的数据发布将提供所有EDF和EAF的星表，并包含欧几里得数据。
英文摘要：
The Cosmic Dawn Survey (DAWN survey) provides multiwavelength (UV/optical to mid-IR) data across the combined 59 deg$^{2}$ of the Euclid Deep and Auxiliary fields (EDFs and EAFs). Here, the first public data release (DR1) from the DAWN survey is presented. DR1 catalogues are made available for a subset of the full DAWN survey that consists of two Euclid Deep fields: Euclid Deep Field North (EDF-N) and Euclid Deep Field Fornax (EDF-F). The DAWN survey DR1 catalogues do not include $Euclid$ data as they are not yet public for these fields. Nonetheless, each field has been covered by the ongoing Hawaii Twenty Square Degree Survey (H20), which includes imaging from CFHT MegaCam in the new $u$ filter and from Subaru Hyper Suprime-Cam (HSC) in the $griz$ filters. Each field is further covered by $Spitzer$/IRAC 3.6-4.5$μ$m imaging spanning 10 deg$^{2}$ and reaching $\sim$25 mag AB (5$σ$). All present H20 imaging and all publicly available imaging from the aforementioned facilities are combined with the deep $Spitzer$/IRAC data to create source catalogues spanning a total area of 16.87 deg$^{2}$ in EDF-N and 2.85 deg$^{2}$ in EDF-F for this first release. Photometry is measured using The Farmer, a well-validated model-based photometry code. Photometric redshifts and stellar masses are computed using two independent codes for modeling spectral energy distributions: EAZY and LePhare. Photometric redshifts show good agreement with spectroscopic redshifts ($σ_{\rm NMAD} \sim 0.5, η< 8\%$ at $i < 25$). Number counts, photometric redshifts, and stellar masses are further validated in comparison to the COSMOS2020 catalogue. The DAWN survey DR1 catalogues are designed to be of immediate use in these two EDFs and will be continuously updated. Future data releases will provide catalogues of all EDFs and EAFs and include $Euclid$ data.
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