{"paper":{"title":"LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC): the second release of value-added catalogues","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Ali Luo, Bingqiu Chen, Chun Wang, Guangwei Li, Guoping Li, Haibo Yuan, Hailong Yuan, Haotong Zhang, Hongliang Yan, Huawei Zhang, Jianling Wang, Jianrong Shi, Ji Li, Jingkun Zhao, Juanjuan Ren, Maosheng Xiang, Taisheng Yan, Wei Zhang, Xiangqun Cui, Xiaowei Liu, Yajuan Lei, Yang Huang, Yiqi Dong, Yongheng Zhao, Yonghui Hou, Yong Yang, Yong Zhang, Yuzhong Wu, Zhijia Tian, Zhiying Huo, Zihuang Cao, Zongui Bai","submitted_at":"2017-01-19T13:34:46Z","abstract_excerpt":"We present the second release of value-added catalogues of the LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC DR2). The catalogues present values of radial velocity $V_{\\rm r}$, atmospheric parameters --- effective temperature $T_{\\rm eff}$, surface gravity log$g$, metallicity [Fe/H], $\\alpha$-element to iron (metal) abundance ratio [$\\alpha$/Fe] ([$\\alpha$/M]), elemental abundances [C/H] and [N/H], and absolute magnitudes ${\\rm M}_V$ and ${\\rm M}_{K_{\\rm s}}$ deduced from 1.8 million spectra of 1.4 million unique stars targeted by the LSS-GAC since September 2011 until June 2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.05409","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}