Large Sky Area Multi-Object Fiber Spectroscopic Telescope
DATA RELEASE 9 v1.1
2011.10.24-2021.06.30
v1.0 v0
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Low Resolution

Observed Plates： 5,533
Total Spectra： 11,211,028
Star： 10,893,354
Galaxy： 241,454
QSO： 76,220
AFGK Stellar Parameters： 7,060,679
M Giants,Dwarfs and Subdwarfs： 818,016
Line indices of A Type Stars:654,963
WD Star Catalog:16,365
CV Star Catalog:524
Galaxy Population Synthesis Catalog:23,768
Qso Emission line Feature Catalog:18,322
Observed
Plates		 Total Spectra Star Galaxy QSO AFGK Stellar
Parameters		 M Giants,Dwarfs
and Subdwarfs		 Line indices of
A Type Stars		 WD Star
Catalog		 CV Star
Catalog		 Galaxy Population
Synthesis Catalog		 Qso Emission line
Feature Catalog
Pilot survey
(20111024-20120617)
 404 880,047 869,203 9,297 1,547 417,753 84,828 65,402 1,546 34 12 693
First year survey
(20120928-20130603)
 812 1,606,077 1,585,991 13,821 6,265 934,247 66,680 79,965 1,468 61 159 2,327
Second year survey
(20130910-20140603)
 732 1,576,036 1,537,704 31,860 6,472 1,125,839 80,921 77,458 1,305 50 2,438 2,827
Third year survey
(20140910-20150530)
 738 1,618,622 1,581,233 27,414 9,975 1,103,981 108,500 88,596 1,829 57 2,579 2,306
Forth year survey
(20150912-20160602)
 776 1,644,240 1,587,582 41,558 15,100 1,100,576 106,724 103,109 2,342 94 4,434 2,075
Fifth year survey
(20160909-20170616)
 693 1,319,379 1,267,104 36,984 15,291 790,723 103,561 89,972 2,701 71 5,075 5,173
Sixth year survey
(20170919-20180518)
 418 834,593 806,115 20,660 7,818 513,531 76,123 52,090 1,743 60 2,653 1,209
Seventh year survey
(20181005-20190608)
 349 625,557 599,610 21,752 4,195 371,105 68,797 41,164 1,579 27 2,418 473
Eighth year survey
(20191023-20200527)
 285 529,204 502,499 21,314 5,391 326,903 59,648 27,720 1,087 39 1,951 741
Ninth year survey
(20200918-20210612)
 326 577,273 556,313 16,794 4,166 376,021 62,184 29,487 765 31 2,049 498
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Medium Resolution

Medium-resolution non time-domain data Medium-resolution time-domain data Total
Total spectra 1,846,438 6,412,924 8,259,362
Star parameter 908,376 774,856 1,683,232

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.