The VANDELS ESO public spectroscopic survey: Observations and first data release-猫眼课题宝

DOI：

10.1051/0004-6361/201833047

发表时间：

2018-03

期刊：

Astronomy & Astrophysics

影响因子：

6.5

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

L. Pentericci;R. J. M. B. Garilli;O. Cucciati;P. Franzetti;A. Iovino;R. Amorín;M. Bolzonella;A. Bongiorno;A. Carnall;M. Castellano;A. Cimatti;M. Cirasuolo;F. Cullen;S. deBarros;J. Dunlop;D. Elbaz;S. Finkelstein;A. Fontana;F. Fontanot;M. Fumana;A. Gargiulo;L. Guaita;W. Hartley;M. Jarvis;S. Juneau;W. Karman;D. Maccagni;F. Marchi;E. Mármol-Queraltó;K. Nandra;E. Pompei;L. Pozzetti;M. Scodeggio;V. Sommariva;M. Talia;O. Almaini;I. Balestra;S. Bardelli;E. Bell;N. Bourne;R. Bowler;M. Brusa;F. Buitrago;C. Caputi;P. Cassata;S. Charlot;A. Citro;G. Cresci;S. Cristiani;E. Curtis-Lake;M. Dickinson;S. Faber;G. Fazio;H. Ferguson;F. Fiore;Maximilien Franco;J. Fynbo;A. Galametz;A. Georgakakis;M. Giavalisco;A. Grazian;N. Hathi;I. Jung;S. Kim;A. Koekemoer;Y. Khusanova;O. Fèvre;J. Lotz;F. Mannucci;D. Maltby;K. Matsuoka;D. McLeod;H. Méndez-Hernández;J. Méndez-Abreu;M. Mignoli;Michele Moresco;A. Mortlock;M. Nonino;M. Pannella;C. Papovich;P. Popesso;D. Rosario;P. Rosati;M. Salvato;P. Santini;D. Schaerer;C. Schreiber;D. Stark;L. Tasca;R. Thomas;T. Treu;E. Vanzella;V. Wild;C. Williams;G. Zamorani;E. Zucca

本文介绍了 ESO 公共光谱调查“VANDELS，对 CANDELS CDFS 和 UDS 领域的深度 VIMOS 调查”的观测结果和首次数据发布 (DR1)。 VANDELS 的主要目标是红移 2.4 < z < 5.5 的恒星形成星系（宇宙尚未达到当前年龄 20% 的时期），以及 1 < z < 2.5 范围内的大质量被动星系。通过采用超长曝光时间策略，每个光源曝光时间从最短 20 小时到最长 80 小时，VANDELS 专门设计为对高红移宇宙进行有史以来最深的光谱调查。利用翻新的 VIMOS 摄谱仪的红灵敏度，该调查获得了覆盖 4800-10 000 Å 波长范围的超深光谱，具有足够高的信噪比，通过对高红移星系的明确吸收线样本进行详细的吸收线研究，研究高红移星系演化的天体物理学。 VANDELS-DR1是在第一季观测期间获得的所有中分辨率光谱数据的发布，范围为以CANDELS-CDFS（钱德拉深场南）和CANDELS-UDS（超深调查）区域为中心的0.2平方度区域。它包括已完成总（或总）计划积分时间的所有星系的数据。 DR1 包含 879 个单独的物体，两个场中各有一半具有测量的红移，最高可靠的红移达到 zspec ~ 6。在 DR1 中，我们包括完全波长校准和通量校准的 1D 光谱、相关的误差光谱和天空光谱，以及相关的波长校准的 2D 光谱。我们还提供了包含基本星系参数的目录，包括合作测量的光谱红移和红移质量标志。我们介绍了勘测布局和观测结果、数据缩减和红移测量程序以及 VANDELS-DR1 样本的一般特性。特别是，我们讨论了每个单独目标类别的光谱红移分布和光度红移的准确性，并提供了各种目标类型和不同质量标志的数据产品的一些示例。所有 VANDELS-DR1 数据都是公开的，并且可以从 ESO 档案中检索。预计未来两年将发布两次数据，目前计划于 2020 年 6 月发布最终数据，其中将包括对整个光谱数据集进行改进的重新缩减。

This paper describes the observations and the first data release (DR1) of the ESO public spectroscopic survey “VANDELS, a deep VIMOS survey of the CANDELS CDFS and UDS fields”. The main targets of VANDELS are star-forming galaxies at redshift 2.4 < z < 5.5, an epoch when the Universe had not yet reached 20% of its current age, and massive passive galaxies in the range 1 < z < 2.5. By adopting a strategy of ultra-long exposure times, ranging from a minimum of 20 h to a maximum of 80 h per source, VANDELS is specifically designed to be the deepest-ever spectroscopic survey of the high-redshift Universe. Exploiting the red sensitivity of the refurbished VIMOS spectrograph, the survey is obtaining ultra-deep optical spectroscopy covering the wavelength range 4800–10 000 Å with a sufficiently high signal-to-noise ratio to investigate the astrophysics of high-redshift galaxy evolution via detailed absorption line studies of well-defined samples of high-redshift galaxies. VANDELS-DR1 is the release of all medium-resolution spectroscopic data obtained during the first season of observations, on a 0.2 square degree area centered around the CANDELS-CDFS (Chandra deep-field south) and CANDELS-UDS (ultra-deep survey) areas. It includes data for all galaxies for which the total (or half of the total) scheduled integration time was completed. The DR1 contains 879 individual objects, approximately half in each of the two fields, that have a measured redshift, with the highest reliable redshifts reaching zspec ~ 6. In DR1 we include fully wavelength-calibrated and flux-calibrated 1D spectra, the associated error spectrum and sky spectrum, and the associated wavelength-calibrated 2D spectra. We also provide a catalog with the essential galaxy parameters, including spectroscopic redshifts and redshift quality flags measured by the collaboration. We present the survey layout and observations, the data reduction and redshift measurement procedure, and the general properties of the VANDELS-DR1 sample. In particular, we discuss the spectroscopic redshift distribution and the accuracy of the photometricredshifts for each individual target category, and we provide some examples of data products for the various target typesand the different quality flags. All VANDELS-DR1 data are publicly available and can be retrieved from the ESO archive. Two further data releases are foreseen in the next two years, and a final data release is currently scheduled for June 2020, which will include an improved rereduction of the entire spectroscopic data set.

The VANDELS ESO public spectroscopic survey: Observations and first data release

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