Inhomogeneity in Spectral Transmission of the Coated UB VRI Filters of BFOSC and its Influence on Photometry
文献类型：期刊论文
| 作者 | Lin Huang1; Yao baoan2 |
| 刊名 | Chinese Journal of Astronomy and Astrophysics
 |
| 出版日期 | 2002 |
| 卷号 | 2期号:6页码:563 |
| ISSN号 | 1009-9271 |
| 英文摘要 | In order to realize the Johnson UBV and Kron-Cousins RI photometric systems in BFOSC, glass filters were purchased according to the Bessell prescription. All the filters are anti-reflection coated,on both sides to increase the transmission. By comparing two dome flat-field exposures taken through any one of these filters set in two orientations 90degrees apart, inhomogeneities in the filter transmission is clearly demonstrated. Using a PDS microphotometer, we have confirmed that the form of their spectral transmission curve varied from point to point on the filters. This kind of inhomogeneity cannot be eliminated by dividing by flat-fielding exposure and must be ascribed to inhomogeneities in the coating. This is not some accidental defect in coating, it is in the existing coating technique because all the filters (including the narrow-band interference ones) for the BFOSC and a Hbeta filter made by another manufacturer showed a similar pattern. We found that for the studies of variable stars with amplitudes less than 0.05 mag. or studies aiming at establishing accurate C-M diagrams of star clusters, the usual uncoated Schott glass filters of Bessell's prescription are to be preferred. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/38037]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.中国科学院上海天文台 |
| 推荐引用方式 GB/T 7714 | Lin Huang,Yao baoan. Inhomogeneity in Spectral Transmission of the Coated UB VRI Filters of BFOSC and its Influence on Photometry[J]. Chinese Journal of Astronomy and Astrophysics,2002,2(6):563. |
| APA | Lin Huang,&Yao baoan.(2002).Inhomogeneity in Spectral Transmission of the Coated UB VRI Filters of BFOSC and its Influence on Photometry.Chinese Journal of Astronomy and Astrophysics,2(6),563. |
| MLA | Lin Huang,et al."Inhomogeneity in Spectral Transmission of the Coated UB VRI Filters of BFOSC and its Influence on Photometry".Chinese Journal of Astronomy and Astrophysics 2.6(2002):563. |
入库方式： OAI收割
来源：国家天文台
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