期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
An algorithm for preferential selection of spectroscopic targets in LEGUE 被引量:1
1
作者 Jeffrey L. Carlin Sebastien Lepine +22 位作者 Heidi Jo Newberg Li-Cai Deng Timothy C. Beers Yu-Qin Chen Norbert Christlie Xiao-Ting Fu Shuang Gao Carl J. Grillmair PuragraGuhathakurta Zhan-Wen Han Jin-Liang Hou Hsu-Tai Lee Jing Li Chao Liu Xiao-Wei Liu Kai-Ke Pan J. A. Sellwood Hong-Chi Wang Fan Yang Brian Yanny Yue-Yang Zhan Zheng Zheng Zi Zhu 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第7期755-771,共17页
We describe a general target selection algorithm that is applicable to any survey in which the number of available candidates is much larger than the number of objects to be observed. This routine aims to achieve a ba... We describe a general target selection algorithm that is applicable to any survey in which the number of available candidates is much larger than the number of objects to be observed. This routine aims to achieve a balance between a smoothly- varying, well-understood selection function and the desire to preferentially select cer- tain types of targets. Some target-selection examples are shown that illustrate differentpossibilities of emphasis functions. Although it is generally applicable, the algorithm was developed specifically for the LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) survey that will be carried out using the Chinese Guo Shou Jing Telescope. In particular, this algorithm was designed for the portion of LEGUE targeting the Galactic halo, in which we attempt to balance a variety of science goals that require stars at fainter magnitudes than can be completely sampled by LAMOST. This algorithm has been implemented for the halo portion of the LAMOST pilot sur- vey, which began in October 2011. 展开更多
关键词 surveys: LAMOST -- Galaxy: halo -- techniques: spectroscopic
下载PDF
The LEGUE high latitude bright survey design for the LAMOST pilot survey
2
作者 Yue-Yang Zhang Jeffrey L. Carlin +14 位作者 Fan Yang Chao Liu Li-Cai Deng Heidi Jo Newberg Hao-Tong Zhang Sebastien Lepine Yan Xu Shuang Gao Norbert Chfi' stlieb Zhan-Wen Han Jin-Liang Hou Hsu-Tai Lee Xiao-Wei Liu Kai-Ke Pan Hong-Chi Wang 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第7期792-804,共13页
We describe the footprint and input catalog for bright nights in the LAMOST Pilot Survey, which began in October 2011. Targets are selected from two stripes in the north and south Galactic Cap regions, centered at δ ... We describe the footprint and input catalog for bright nights in the LAMOST Pilot Survey, which began in October 2011. Targets are selected from two stripes in the north and south Galactic Cap regions, centered at δ = 29°, with 10° width in declination, covering right ascensions of 135° to 290° and -30° to 30° re- spectively. We selected spectroscopic targets from a combination of the SDSS and 2MASS point source catalogs. The catalog of stars defining the field centers (as re- quired by the Shack-Hartmann wavefront sensor at the center of the LAMOST field) consists of all V 〈 8m stars from the Hipparcos catalog. We employ a statistical selection algorithm that assigns priorities to targets based on their positions in mul- tidimensional color/magnitude space. This scheme overemphasizes rare objects and de-emphasizes more populated regions of magnitude and color phase space, while en- suring a smooth, well-understood selection function. A demonstration of plate design is presented based on the Shack-Hartmann star catalog and an input catalog that was generated by our target selection routines. 展开更多
关键词 surveys: LAMOST -- techniques: spectroscopic -- Galaxy: stellar con-tent
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部