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大天文台起源于深度测量。GOODS-South场的VLT/FORS2光谱学:III部分

The Great Observatories Origins Deep Survey. VLT/FORS2 Spectroscopy in the GOODS-South Field: Part III

E. Vanzella, S. Cristiani, M. Dickinson, M. Giavalisco, H. Kuntschner, J. Haase, M. Nonino, P. Rosati, C. Cesarsky, H. C. Ferguson, R. A. E. Fosbury, A. Grazian… 展开作者

E. Vanzella, S. Cristiani, M. Dickinson, M. Giavalisco, H. Kuntschner, J. Haase, M. Nonino, P. Rosati, C. Cesarsky, H. C. Ferguson, R. A. E. Fosbury, A. Grazian, L. A. Moustakas, A. Rettura, P. Popesso, A. Renzini, D. Stern, the GOODS Team

摘要:

目标。我们目前的光谱活动的ESO/GOODS计划在GOODS南领域,在ESO/VLT的FORS 2摄谱仪获得的完整数据集。法选择天体作为VLT/FORS 2观测的候选对象,主要是基于这样的期望,即对天体光谱特征的探测和测量将受益于FORS 2的高通量和光谱分辨率。利用红移-星等图和色红移图对红移估计的可靠性进行了评估,并将结果与公开数据进行了比较。结果包括光谱活动的第三部分(12个掩模)到以前的工作(26个掩模,Vanzella等人,2005年,2006年),分析了1225个单独目标的1715个光谱。实际的光谱目录提供了887个红移测定。典型的红移不确定度估计为sigma(z)~ 0.001。采用不同的颜色标准和光度红移选择镓。由此产生的红移分布通常跨越两个域:从z=0.5到2和z=3.5到6.3。通过ESO的网页http://www.eso.org/science/goods/向社区发布约化光谱和导出的红移。

英文摘要:

Aims. We present the full data set of the spectroscopic campaign of the ESO/GOODS program in the GOODS-South field, obtained with the FORS2 spectrograph at the ESO/VLT. Method. Objects were selected as candidates for VLT/FORS2 observations primarily based on the expectation that the detection and measurement of their spectral features would benefit from the high throughput and spectral resolution of FORS2. The reliability of the redshift estimates is assessed using the redshift-magnitude and color-redshift diagrams, and comparing the results with public data. Results. Including the third part of the spectroscopic campaign (12 masks) to the previous work (26 masks, Vanzella et al. 2005, 2006), 1715 spectra of 1225 individual targets have been analyzed. The actual spectroscopic catalog provides 887 redshift determinations. The typical redshift uncertainty is estimated to be sigma(z) ~ 0.001. Galaxies have been selected adopting different color criteria and using photometric redshifts. The resulting redshift distribution typically spans two domains: from z=0.5 to 2 and z=3.5 to 6.3. The reduced spectra and the derived redshifts are released to the community through the ESO web page http://www.eso.org/science/goods/

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