Large Sky Area Multi-Object Fiber Spectroscopic Telescope
DATA RELEASE 9 v1.0
2011.10.24-2021.06.30
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LAMOST DR9 TOTAL

Observed Plates: 5,533
Total Spectra: 11,226,252
Star: 10,907,516
Galaxy: 242,569
QSO: 76,167
AFGK Stellar Parameters: 7,060,436
M Giants,Dwarfs and Subdwarfs: 832,755
Line indices of A Type Stars:654,940
WD Star Catalog:16,382
CV Star Catalog:489
Galaxy Population Synthesis Catalog:23,770
Qso Emission line Feature Catalog:18,323

Low Resolution

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)
404 882,478 871,461 9,470 1,547 417,753 87,107 65,397 1,547 32 12 693
First year survey
(20120928-20130603)
812 1,607,261 1,587,141 13,856 6,264 934,247 67,845 79,965 1,468 59 159 2,327
Second year survey
(20130910-20140603)
732 1,577,403 1,538,998 31,933 6,472 1,125,840 82,244 77,458 1,308 41 2,438 2,827
Third year survey
(20140910-20150530)
738 1,619,931 1,582,446 27,512 9,973 1,103,981 109,791 88,596 1,832 55 2,579 2,306
Forth year survey
(20150912-20160602)
776 1,645,774 1,589,023 41,653 15,098 1,100,576 108,186 103,111 2,344 86 4,434 2,075
Fifth year survey
(20160909-20170616)
693 1,321,076 1,268,674 37,116 15,286 790,723 105,180 89,971 2,706 65 5,075 5,174
Sixth year survey
(20170919-20180518)
418 835,497 806,975 20,720 7,802 513,531 77,008 52,087 1,744 60 2,653 1,209
Seventh year survey
(20181005-20190608)
349 627,970 601,948 21,833 4,189 370,861 71,432 41,153 1,580 26 2,418 473
Eighth year survey
(20191023-20200527)
285 531,349 504,588 21,382 5,379 326,903 61,782 27,713 1,087 41 1,951 741
Ninth year survey
(20200918-20210612)
326 577,513 556,262 17,094 4,157 376,021 62,180 29,489 766 24 2,051 498
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Medium Resolution

Medium-resolution non time-domain data Medium-resolution time-domain data Total
Total spectra 1,841,959 6,384,475 8,226,434
Star parameter 906,003 771,211 1,677,214

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.