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Post Info TOPIC: Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)
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RE: Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)
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Title: The first symbiotic stars from the LAMOST survey
Author: Jiao Li, Joanna Mikoajewska, Xue-Fei Chen, A-Li Luo, Alberto Rebassa-Mansergas, Yonghui Hou, Yuefei Wang, Yue Wu, Ming Yang, Yong Zhang, Zhan-Wen Han

Symbiotic stars are interacting binary systems with the longest orbital periods. They are typically formed by a white dwarf, a red giant and a nebula. These objects are natural astrophysical laboratories for studying the evolution of binaries. Current estimates of the population of Milky Way symbiotic stars vary from 3000 up to 400000. However, the current census is less than 300. The Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) survey can obtain hundreds of thousands of stellar spectra per year, providing a good opportunity to search for new symbiotic stars. In this work we detect 4 of such binaries among 4,147,802 spectra released by the LAMOST, of which two are new identifications. The first is LAMOST J12280490-014825.7, considered to be an S-type halo symbiotic star. The second is LAMOST J202629.80+423652.0, a D-type symbiotic star.

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LAMOST general survey
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Title: The First Data Release (DR1) of the LAMOST general survey
Author: A.-L. Luo, Y.-H. Zhao, G. Zhao, L.-C. Deng, X.-W. Liu, Y.-P. Jing, G. Wang, H.-T Zhang, J.-R. Shi, X.-Q. Cui, Y.-Q. Chu, G.-P. Li, Z.-R. Bai, Y. Cai, S.-Y. Cao, Z.-H Cao, J. L. Carlin, H. Y. Chen, J.-J. Chen, K.-X. Chen, L. Chen, X.-L. Chen, X.-Y. Chen, Y. Chen, N. Christlieb, J.-R. Chu, C.-Z. Cui, Y.-Q. Dong, B. Du, D.-W. Fan, L. Feng, J.-N Fu, P. Gao, X.-F. Gong, B.-Z. Gu, Y.-X. Guo, Z.-W. Han, B.-L. He, J.-L. Hou, Y.-H. Hou, W. Hou, H.-Z. Hu, N.-S. Hu, Z.-W. Hu, Z.-Y. Huo, L. Jia, F.-H. Jiang, X. Jiang, Z.-B. Jiang, G. Jin, X. Kong, X. Kong, Y.-J. Lei, A.-H. Li, C.-H. Li, G.-W. Li, H.-N. Li, J. Li, Q. Li, S. Li, S.-S. Li, X.-N. Li, Y. Li, Y.-B. Li, Y.-P. Li, Y. Liang, C.-C. Lin, C. Liu, G.-R. Liu, G.-Q. Liu, Z.-G. Liu, W.-Z. Lu, Y. Luo, Y.-D. Mao, H. Newberg, J.-J. Ni, Z.-X. Qi, Y.-J. Qi, et al. (67 additional authors not shown)

The Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) General Survey is a spectroscopic survey that will eventually cover approximately half of the celestial sphere and collect 10 million spectra of stars, galaxies and QSOs. Objects both in the pilot survey and the first year general survey are included in the LAMOST First Data Release (DR1). The pilot survey started in October 2011 and ended in June 2012, and the data have been released to the public as the LAMOST Pilot Data Release in August 2012. The general survey started in September 2012, and completed its first year of operation in June 2013. The LAMOST DR1 includes a total of 1202 plates containing 2,955,336 spectra, of which 1,790,879 spectra have observed signal-to-noise S/N >10. All data with S/N>2 are formally released as LAMOST DR1 under the LAMOST data policy. This data release contains a total of 2,204,696 spectra, of which 1,944,329 are stellar spectra, 12,082 are galaxy spectra and 5,017 are quasars. The DR1 includes not only spectra, but also three stellar catalogues with measured parameters: AFGK-type stars with high quality spectra (1,061,918 entries), A-type stars (100,073 entries), and M stars (121,522 entries). This paper introduces the survey design, the observational and instrumental limitations, data reduction and analysis, and some caveats. Description of the FITS structure of spectral files and parameter catalogues is also provided.

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RE: Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)
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Largest reflector telescope in China uses custom eddy current sensors
Precision sensor specialist Micro-Epsilon has supplied 600 eddy current sensors to the Chinese Academy of Science for use on the LAMOST (Large sky Area Multi-Object fibre Spectroscopic Telescope), the largest reflector telescope in China.

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LAMOST
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China built the finest optical telescope to scan 10 million celestial spectra in the coming five-to-six years, one of the world's most ambitious astronomical endeavours to record key data betraying how the universe was formed.
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The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) is a meridian reflecting Schmidt telescope. Using active optics technique to control its reflecting corrector makes it a unique astronomical instrument in combining large aperture with wide field of view. The available large focal plane may accommodate up to thousands of fibres, by which the collected light of distant and faint celestial objects down to 20.5 magnitude is fed into the spectrographs, promising a very high spectrum acquiring rate of ten-thousands of spectra per night.

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National Astronomical Observatories from Chinese Academy of Sciences has completed their long awaited project "The Large Sky Area Multi-Object Fibre Spectroscopic Telescope or LAMOST".
Inspired by previous telescope Sloan Digital Sky Survey, it was build at a cost of $34.40 million. A diameter of 50 meters, with a total height over 58 meters, that is equivalent of two-story building of large-scale astronomical observation equipment, and with a gross weight over 700 tons, LAMOST is world's biggest fixed spectrometer telescope.

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China is commissioning a strangely shaped telescope in the forested hills northeast of Beijing that Chinese scientists said will be the world's most efficient tool for mapping the galaxy in three dimensions.
Unlike most such instruments, where the whole telescope moves to follow the object being studied in the sky, the Chinese design features a fixed structure and two moveable, segmented mirrors.
Rather than the traditional dome shape employed for most large telescopes, China's new instrument looks like a large, white, skewed pi symbol.

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Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)
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A giant surrealistic tower, erratically skewed, points at the sky on top of a 960-meter hill 170 kilometres northeast of Beijing.
The white structure, with a wide dome at its lower end, looks more like a missile silo. Chinese scientists have built the world's most powerful optical telescope in a research base of the National Astronomical Observatories, Chinese Academy of Sciences (NAOC), expecting to unravel the mysteries of the universe.
The advanced astronomical facility, which cost 235 million yuan (34.4 million U.S. dollars) from the national research fund, has an effective aperture of over four meters, the biggest of its kind in the world, and 4,000 optical fibres that can simultaneously track space and decode starlight into enormous amounts of spectrographic data.
With its specifications, the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST), the official moniker of the mammoth device, can see at least twice as far into space and measure more spectral emissions than the previous No. 1 which inspired LAMOST, the Sloan Digital Sky Survey (SDSS).
Prof. Cui Xiangqun, lead engineer for the ambitious project, said  LAMOST combines both large clear aperture and wide field of view into one single sky-monitoring instrument, which enables the highest spectrum acquiring rate in the world.
The team of engineers, which grouped the country's most talented telescope builders, mounted a four-meter segmented reflecting mirror at the lower end of the building. During observation nights, the upper parts of the dome would be removed, starlight would be reflected from the lower mirror up through the 20-meter tube to a 6-meter primary mirror. Then the light of space is fed into the front ends of optical fibres accurately positioned on a focal plane, before real-time data are recorded into spectrographs fixed in a room underneath.

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