Astrometry and Photometry with HST WFC3. I. Geometric Distortion Corrections of F225W, F275W, F336W Bands of the UVIS Channel
Astrometry and Photometry with HST WFC3. I. Geometric Distortion Corrections of F225W, F275W, F336W Bands of the UVIS Channel
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DOI：
10.1086/649061
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发表时间：
2009-12-01
影响因子：
3.5
通讯作者：
Bedin, L. R.
中科院分区：
文献类型：
--
作者：
Bellini, A.;Bedin, L. R.
哈勃空间望远镜3号宽视场相机UVIS通道的精确几何失真解决方案是其用于高精度天体测量的第一步。在这项工作中，我们提出了一个平均修正，使一个相对天体测量精度类似于1质量（在每个轴上曝光良好的恒星）在三个宽带紫外线过滤器（F225 W，F275 W，和F336 W）。需要更多的数据和对仪器的更好理解，以将解决方案限制在更高的准确度水平。
An accurate geometric distortion solution for the Hubble Space Telescope UVIS channel of Wide Field Camera 3 is the first step toward its use for high-precision astrometry. In this work we present an average correction that enables a relative astrometric accuracy of similar to 1 mas (in each axis for well-exposed stars) in three broadband ultraviolet filters (F225W, F275W, and F336W). More data and a better understanding of the instrument are required to constrain the solution to a higher level of accuracy.