DIFFERENCE IMAGE ANALYSIS OF DEFOCUSED OBSERVATIONS WITH CSTAR
文献类型：期刊论文
| 作者 | Oelkers, Ryan J.1; Macri, Lucas M.1; Wang, Lifan1,2,3 ; Ashley, Michael C. B.4; Cui, Xiangqun3,5; Feng, Long-Long2,3; Gong, Xuefei3,5; Lawrence, Jon S.4,6; Qiang, Liu3,7; Luong-Van, Daniel4
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2015-02-01 |
| 卷号 | 149期号:2页码:50 |
| 关键词 | methods: data analysis stars: variables: general |
| 英文摘要 | The Chinese Small Telescope ARray carried out high-cadence time-series observations of 27 square degrees centered on the South Celestial Pole during the Antarctic winter seasons of 2008-2010. Aperture photometry of the 2008 and 2010 i-band images resulted in the discovery of over 200 variable stars. Yearly servicing left the array defocused for the 2009 winter season, during which the system also suffered from intermittent frosting and power failures. Despite these technical issues, nearly 800,000 useful images were obtained using g, r, and clear filters. We developed a combination of difference imaging and aperture photometry to compensate for the highly crowded, blended, and defocused frames. We present details of this approach, which may be useful for the analysis of time-series data from other small-aperture telescopes regardless of their image quality. Using this approach, we were able to recover 68 previously known variables and detected variability in 37 additional objects. We also have determined the observing statistics for Dome A during the 2009 winter season; we find the extinction due to clouds to be less than 0.1 and 0.4 mag for 40% and 63% of the dark time, respectively. |
| 学科主题 | 天文和天体物理 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | VARIABLE-STARS ; SPACED DATA ; PHOTOMETRY ; ANTARCTICA ; DOME ; TELESCOPE ; SUBTRACTION ; PRECISION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000349360200015 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14893]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Texas A&M Univ, Dept Phys & Astron, George P & Cynthiya W Mitchell Inst Fundamental, College Stn, TX 77843 USA 2.Chinese Acad Sci, Purple Mt Observ, Nanjing, Peoples R China 3.Chinese Ctr Antarct Astron, Nanjing, Peoples R China 4.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia 5.Nanjing Inst Astron Optic & Technol, Nanjing, Peoples R China 6.Australian Astron Observ, Epping, NSW, Australia 7.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 8.Inst Nucl & Particle Astrophys, Lawrence Berkeley Natl Lab, Berkeley, CA USA 9.Polar Res Inst China, Shanghai, Peoples R China 10.Univ Chicago, Enrico Fermi Inst, Dept Astron & Astrophys, Chicago, IL 60637 USA |
| 推荐引用方式 GB/T 7714 | Oelkers, Ryan J.,Macri, Lucas M.,Wang, Lifan,et al. DIFFERENCE IMAGE ANALYSIS OF DEFOCUSED OBSERVATIONS WITH CSTAR[J]. ASTRONOMICAL JOURNAL,2015,149(2):50. |
| APA | Oelkers, Ryan J..,Macri, Lucas M..,Wang, Lifan.,Ashley, Michael C. B..,Cui, Xiangqun.,...&Zhu, Zhenxi.(2015).DIFFERENCE IMAGE ANALYSIS OF DEFOCUSED OBSERVATIONS WITH CSTAR.ASTRONOMICAL JOURNAL,149(2),50. |
| MLA | Oelkers, Ryan J.,et al."DIFFERENCE IMAGE ANALYSIS OF DEFOCUSED OBSERVATIONS WITH CSTAR".ASTRONOMICAL JOURNAL 149.2(2015):50. |
入库方式： OAI收割
来源：紫金山天文台
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