Large Sky Area Multi-Object Fiber Spectroscopic Telescope
DATA RELEASE 7 v1.2
2011.10.24 - 2019.06.08
DR7 Update

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Low Resolution

Observed Plates：4922   Total Spectra：10599979
Observed
Plates		 Total Spectra Star STAR
(SNg or i > 10)		 Galaxy QSO Unknown AFGK Star
Catalog		 M Star
Catalog		 A Star
Catalog
Pilot
20111024-20120617
 404 958,191 874,456 682,038 8,762 1,530 73,443 401,410 87,847 65,668
First year
20120928-20130603
 812 1,686,673 1,591,136 1,392,302 13,247 6,261 76,029 910,731 68,087 80,285
Second year
20130910-20140603
 732 1,636,537 1,541,618 1,425,674 31,060 6,460 57,399 1,094,879 82,453 77,647
Third year
20140910-20150530
 738 1,639,996 1,549,124 1,439,225 27,047 9,825 54,000 1,046,891 105,788 88,136
Forth year
20150912-20160602
 776 1,702,330 1,589,188 1,478,998 40,382 15,050 57,710 1,059,008 108,186 103,281
Fifth year
20160909-20170616
 693 1,402,996 1,274,437 1,151,716 36,592 15,259 76,708 762,731 105,594 90,707
Sixth year
20170919-20180518
 418 884,614 811,098 749,531 20,180 7,783 45,553 497,902 77,330 52,412
Seventh year
20181005-20190608
 349 688,642 611,215 566,445 21,170 4,161 52,096 359,169 72,329 42,243

Medium Resolution

Medium-resolution non time-domain data Medium-resolution time-domain data Total
Total spectra
 1,008,710 2,878,717 3,887,427
Spectra(S/N>10) 670,166 1,609,930 2,280,096
Star parameter 512,723 286,987 799,710

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.