Title: HETDEX Public Source Catalog 1: 220K Sources Including Over 50K Lyman Alpha Emitters from an Untargeted Wide-area Spectroscopic Survey Show Chinese title

Title: HETDEX公共源目录1：来自一项无目标广域光谱巡天的包含超过50K个Lyα发射体的22万个源

Abstract: We present the first publicly released catalog of sources obtained from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral field spectroscopic survey designed to measure the Hubble expansion parameter and angular diameter distance at 1.88<z<3.52 by using the spatial distribution of more than a million Ly-alpha-emitting galaxies over a total target area of 540 deg^2. The catalog comes from contiguous fiber spectra coverage of 25 deg^2 of sky from January 2017 through June 2020, where object detection is performed through two complementary detection methods: one designed to search for line emission and the other a search for continuum emission. The HETDEX public release catalog is dominated by emission-line galaxies and includes 51,863 Ly{\alpha}-emitting galaxy (LAE) identifications and 123,891 OII-emitting galaxies at z<0.5. Also included in the catalog are 37,916 stars, 5274 low-redshift (z<0.5) galaxies without emission lines, and 4976 active galactic nuclei. The catalog provides sky coordinates, redshifts, line identifications, classification information, line fluxes, OII and Ly-alpha line luminosities where applicable, and spectra for all identified sources processed by the HETDEX detection pipeline. Extensive testing demonstrates that HETDEX redshifts agree to within deltaz < 0.02, 96.1% of the time to those in external spectroscopic catalogs. We measure the photometric counterpart fraction in deep ancillary Hyper Suprime-Cam imaging and find that only 55.5% of the LAE sample has an r-band continuum counterpart down to a limiting magnitude of r~26.2 mag (AB) indicating that an LAE search of similar sensitivity with photometric pre-selection would miss nearly half of the HETDEX LAE catalog sample. Data access and details about the catalog can be found online at http://hetdex.org/. Show Chinese abstract

Abstract: 我们发布了来自 Hobby-Eberly 望远镜暗能量实验（HETDEX）的第一个公开源目录。HETDEX 是一项积分场光谱巡天，旨在通过使用超过一百万个发射氢alpha（Ly-alpha）的星系的空间分布，在目标区域总面积为540平方度的情况下，测量红移范围在1.88到3.52之间的哈勃膨胀参数和角直径距离。该目录来自从2017年1月至2020年6月期间连续25平方度天空的光纤光谱覆盖，其中对象检测通过两种互补的检测方法进行：一种设计用于搜索发射线，另一种用于搜索连续发射。 HETDEX 公开发布目录主要由发射线星系组成，包括51,863个 Ly{\alpha }-发射星系（LAE）识别和123,891个红移小于0.5的OII发射星系。目录中还包括37,916颗恒星，5274个低红移（z<0.5）无发射线的星系，以及4976个活动星系核。目录提供了所有已识别源的天球坐标、红移、线识别、分类信息、线流量、适用时的OII和Ly-alpha线亮度，以及经过 HETDEX 检测管道处理的所有源的光谱。 广泛的测试表明，HETDEX 红移与外部光谱目录中的红移一致，误差小于 deltaz < 0.02，占96.1%的时间。我们在深部辅助 Hyper Suprime-Cam 成像中测量了光度对应物的比例，并发现只有55.5%的 LAE 样本具有 r 波段连续光对应物，极限星等达到 r~26.2 mag（AB），这表明使用相同灵敏度的 LAE 搜索并结合光度预选将错过 HETDEX LAE 目录样本近一半。 数据访问和目录详情可以在 http://hetdex.org/ 上找到。