LAMOST DR4 v2
Large Sky Area Multi-Object Fiber Spectroscopic Telescope
Updated: Data Release 4 v2
Link to DR4 v1
2011.10.24-2016.06.02
Observed Plates: 3,461
Total Spectra: 7,620,612
Release Note
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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 964,388 1,682,012 1,632,542 1,640,144 1,701,526
Star 837,056 1,536,045 1,504,329 1,516,147 1,551,394
Star (SNg or i > 10) 683,546 1,387,097 1,417,369 1,432,940 1,472,138
Galaxy 8,045 12,734 30,432 26,288 39,498
QSO 1,227 6,035 6,382 8,753 13,954
Unknown 118,060 127,198 91,399 88,956 96,680
Observed Plates 404 811 732 738 776
AFGK Star Catalog 405,955 911,235 1,095,486 1,053,394 1,071,366
A Star Catalog 54,207 68,950 70,182 77,847 93,183
M Dwarf Catalog 81,473 66,643 78,205 107,489 99,671

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.