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arXiv 2209.14482astro-ph.IMastro-ph.CO
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暗能量光谱仪的光谱数据处理流水线

The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument

J. Guy, S. Bailey, A. Kremin, Shadab Alam, D. M. Alexander, C. Allende Prieto, S. BenZvi, A. S. Bolton, D. Brooks, E. Chaussidon, A. P. Cooper, K. Dawson, A. de… 展开作者

J. Guy, S. Bailey, A. Kremin, Shadab Alam, D. M. Alexander, C. Allende Prieto, S. BenZvi, A. S. Bolton, D. Brooks, E. Chaussidon, A. P. Cooper, K. Dawson, A. de la Macorra, A. Dey, Biprateep Dey, G. Dhungana, D. J. Eisenstein, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, D. Green, K. Honscheid, M. Ishak, R. Kehoe, D. Kirkby, T. Kisner, Sergey E. Koposov, Ting-Wen Lan, M. Landriau, L. Le Guillou, Michael E. Levi, C. Magneville, Christopher J. Manser, P. Martini, Aaron M. Meisner, R. Miquel, J. Moustakas, Adam D. Myers, Jeffrey A. Newman, Jundan Nie, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, A. Raichoor, C. Ravoux, A. J. Ross, E. F. Schlafly, D. Schlegel, M. Schubnell, Ray M. Sharples, Gregory Tarlé, B. A. Weaver, Christophe Yèche, Rongpu Zhou, Zhimin Zhou, H. Zou

摘要:

我们描述的光谱数据处理管道的暗能量光谱仪器(DESI),这是进行红移调查约4000万星系和类星体使用一个专门建造的仪器上的4米Mayall望远镜在基特峰国家天文台。DESI的主要目标是用重子声学振荡技术以前所未有的精度测量宇宙的膨胀历史和用红移空间畸变测量结构的增长率。10台光谱仪配备3台摄像机,每台光谱仪将5000根光纤的光线分散到30个CCD上,覆盖近紫外到近红外(3600到9800埃),光谱分辨率范围从2000到5000。DESI数据管道生成所有目标的波长和通量校准光谱,以及光谱分类和红移测量。每天晚上完全处理的数据通常在第二天早上提供给DESI协作。我们详细介绍了流水线的算法,并提供了光学系统的稳定性,天空背景减除的质量,以及仪器校准的精度和准确性的性能结果。该管道已被用于处理DESI测量验证数据集,并超过了项目对红移性能的要求,具有高效率和所有目标类的纯度大于99%。

英文摘要:

We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4-m Mayall Telescope at Kitt Peak National Observatory. The main goal of DESI is to measure with unprecedented precision the expansion history of the Universe with the Baryon Acoustic Oscillation technique and the growth rate of structure with Redshift Space Distortions. Ten spectrographs with three cameras each disperse the light from 5000 fibers onto 30 CCDs, covering the near UV to near infrared (3600 to 9800 Angstrom) with a spectral resolution ranging from 2000 to 5000. The DESI data pipeline generates wavelength- and flux-calibrated spectra of all the targets, along with spectroscopic classifications and redshift measurements. Fully processed data from each night are typically available to the DESI collaboration the following morning. We give details about the pipeline's algorithms, and provide performance results on the stability of the optics, the quality of the sky background subtraction, and the precision and accuracy of the instrumental calibration. This pipeline has been used to process the DESI Survey Validation data set, and has exceeded the project's requirements for redshift performance, with high efficiency and a purity greater than 99 percent for all target classes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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