Large Sky Area Multi-Object Fiber Spectroscopic Telescope
DATA RELEASE 7 v2.0
2011.10.24 - 2019.06.08
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DR7 Low Resolution

Observed Plates:4,922
Total Spectra:10,431,197
Star:9,846,793
Star (SNg or i > 10):8,912,384
Galaxy:198,272
Qso:66,612
Unknown:319,520
AFGK Stellar Parameters:6,179,327
M Giants,Dwarfs and Subdwarfs:708,797
Line indices of A Type Stars:597,762
WD Star Catalog:14,531
CV Star Catalog:424
Pilot survey
(20111024-20120617)
First year survey
(20120928-20130603)
Second year survey
(20130910-20140603)
Third year survey
(20140910-20150530)
Forth year survey
(20150912-20160602)
Fifth year survey
(20160909-20170616)
Sixth year survey
(20170919-20180518)
Seventh year survey
(20181005-20190608)
Observed Plates 404 812 732 738 776 693 418 349
Total Spectra 927,083 1,668,595 1,620,710 1,658,182 1,683,886 1,361,034 857,910 653,797
Star 871,524 1,587,150 1,539,005 1,582,450 1,589,032 1,268,708 806,975 601,949
Star
(SNg or i > 10)
682,274 1,391,694 1,425,391 1,472,982 1,481,261 1,150,086 748,571 560,125
Galaxy 8,760 13,221 31,055 26,996 40,370 36,582 20,179 21,109
Qso 1,547 6,264 6,472 9,973 15,098 15,286 7,802 4,170
Unknown 45,252 61,960 44,178 38,763 39,386 40,458 22,954 26,569
AFGK
Stellar Parameters
403,155 912,743 1,098,197 1,074,362 1,064,972 765,468 499,538 360,892
M Giants,Dwarfs
and Subdwarfs
87,109 67,845 82,245 109,791 108,186 105,181 77,008 71,432
Line indices
of A Type Stars
65,406 79,966 77,460 88,599 103,116 89,975 52,087 41,153
WD Star Catalog 1,549 1,468 1,308 1,832 2,344 2,706 1,744 1,580
CV Star Catalog 32 59 41 55 86 65 60 26

DR7 Medium Resolution

Medium-resolution non time-domain data Medium-resolution time-domain data Total
Total spectra
988,188 2,828,655 3,816,843
Spectra(S/N>10) 658,310 1,587,983 2,246,293
Star parameter 471,320 266,705 738,025

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.