LAMOST光谱巡天第六次数据发布第二版

LAMOST第六年巡天数据发布V2版（LAMOST DR6 v2）包括先导巡天及前六年正式巡天的光谱数据，以及2017年9月-2018年6月期间的中分辨率光谱。DR6共包括4901个观测天区。发布低分辨率光谱总数9,911,337条，中分辨率非时域光谱数据506,387条，中分辨率时域数据860,302条。其中高质量光谱数（S/N>10）938万条，还包括一个5,773,552组恒星光谱参数星表。

LAMOST Sixth Data Release v2 (LAMOST DR6 v2) encompasses spectroscopic data from the pilot survey and the first six years of the formal survey, along with medium-resolution spectroscopic data acquired between September 2017 and June 2018. DR6 covers a total of 4901 observed survey fields. Specifically, the release includes 9,911,337 low-resolution spectra, 506,387 medium-resolution non-time-domain spectroscopic datasets, and 860,302 medium-resolution time-domain spectroscopic datasets. Among these, 9.38 million spectra are of high quality with signal-to-noise ratio (S/N) greater than 10, and the release also features a stellar spectral parameter catalog containing 5,773,552 sets of parameters.