LAMOST DR4 v1
Large Sky Area Multi-Object Fiber Spectroscopic Telescope
Updated: Data Release 4 v1
2011.10.24-2016.06.02
Observed Plates: 3,459
Total Spectra: 7,661,651
DR4 UPDATE (2017.06.30)
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Statistics

Pilot Survey

20111024-20120617

First Year Survey

20120928-20130603

Second Year Survey

20130910-20140603

Third Year Survey

20140910-20150530

Forth Year Survey

20150912-20160602
Total Spectra 949,709 1,698,152 1,639,055 1,680,322 1,694,413
Star 801,020 1,522,413 1,488,556 1,524,838 1,519,730
Star (SNg or i > 10) 616,897 1,304,698 1,363,593 1,394,843 1,401,966
Galaxy 8,291 12,896 30,799 26,903 39,764
QSO 1,220 6,052 6,385 8,828 13,889
Unknown 139,178 156,791 113,315 119,753 121,030
Observed Plates 404 810 731 738 776
AFGK Star Catalog 395,787 857,607 1,044,308 1,029,746 1,012,375
A Star Catalog 53,431 69,622 71,380 78,488 92,180
M Dwarf Catalog 82,986 67,211 78,893 108,247 99,445

Standard acknowledgement

Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope LAMOST) is a National Major Scientific Project built by the Chinese Academy of Sciences. Funding for the project has been provided by the National Development and Reform Commission. LAMOST is operated and managed by the National Astronomical Observatories, Chinese Academy of Sciences.