The LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap I. The Spectroscopic Redshift Catalog
Ming Yang, Hong Wu, Fan Yang, Man I Lam, Tian-Wen Cao, Chao-Jian Wu,, Pin-Song Zhao, Tian-Meng Zhang, Zhi-Min Zhou, Xue-Bing Wu, Yan-Xia Zhang,, Zheng-Yi Shao, Yi-Peng Jing, Shi-Yin Shen, Yi-Nan Zhu, Wei Du, Feng-Jie Lei,, Min He, Jun-Jie Jin, Jian-Rong Shi, Wei Zhang

TL;DR
This paper presents a comprehensive spectroscopic redshift catalog from the LaCoSSPAr survey in the Southern Galactic Cap, demonstrating high completeness, effective post-processing, and insights into galaxy populations and survey reliability.
Contribution
It provides the first large-scale, high-precision redshift catalog for the SGC from LAMOST, including methods for improving low SNR spectra and analyzing galaxy populations.
Findings
Over 10,000 spectra inspected for redshift measurement.
High success rate in deriving redshifts from low SNR galaxies.
Identification of potential galaxy populations and survey reliability issues.
Abstract
We present a spectroscopic redshift catalog from the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap (SGC), which is designed to observe all sources (Galactic and extra-galactic) by using repeating observations with a limiting magnitude of in two fields. The project is mainly focusing on the completeness of LAMOST ExtraGAlactic Surveys (LEGAS) in the SGC, the deficiencies of source selection methods and the basic performance parameters of LAMOST telescope. In both fields, more than 95% of galaxies have been observed. A post-processing has been applied to LAMOST 1D spectrum to remove the majority of remaining sky background residuals. More than 10,000 spectra have been visually inspected to measure the redshift by using combinations of different emission/absorption features with uncertainty of…
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