Study of the evolution of the ACS/WFC charge transfer efficiency
Study of the evolution of the ACS/WFC charge transfer efficiency
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ACS/WFC电荷转移效率演化研究
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Jay Anderson
中科院分区：
文献类型：
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作者：
L. Úbeda;Jay Anderson
我们进行了全面和详细的研究的演变的电荷转移效率（CTE）的影响的宽视场通道的高级相机的调查（ACS）。该研究基于ACS在2002年至2011年期间产生的所有暗帧中的暖像素的轮廓。我们应用安德森和Bedin（2010，PASP，122，1035）的基于像素的经验方法，其恢复原始图像中的源的通量、位置和形状。我们证明了这种图像恢复过程正确地解释了ACS中CTE的时间和温度依赖性，并且它适用于所有时期：相机在−77 ° C下操作时的原始设置以及在当前温度设置为−81 ° C时获得的后SM 4数据。我们还表明，该代码已成功地集成在ACS校准和减少管道CALACS。
We perform a comprehensive and detailed study of the evolution of the effect of charge transfer efficiency (CTE) of the Wide-Field Channel of the Advanced Camera for Surveys (ACS). The study is based on the profiles of warm pixels in all the dark frames ever produced by ACS between 2002 and 2011. We apply the pixel-based empirical approach by Anderson & Bedin (2010, PASP, 122, 1035) which restores flux, position and shape of sources in the original images. We demonstrate that this image-restoration process properly accounts for the time and temperature dependence for CTE in ACS, and that it works for all epochs: the original setting when the camera was operated at −77◦C and also on the post-SM4 data obtained with the current temperature set at −81◦C. We also demonstrate that the code has been successfully integrated in the ACS calibration and reduction pipeline CALACS.