4 papers
Measuring the Column Dependence of Read Noise in ACS/WFC Bias Frames
Alyssa M. Guzman, Meaghan C. McDonald
The noise in bias frames for all four readout amplifiers in the Advanced Camera for Surveys (ACS) Wide Field Channel (WFC) is dependent on row number. This is because dark current…
Evolution of Sink Pixels in ACS/WFC and Connection to Charge Transfer Efficiency
Alyssa M. Guzman, Jenna E. Ryon
In our study spanning 2015-2021, we examined sink pixels (SPs) in the Advanced Camera for Surveys Wide Field Channel (ACS/WFC) using dark and SP reference files. SPs are pixels wit…
Using 23 Years of ACS/SBC Data to Understand Backgrounds: Explaining & Predicting Background Variations
Christopher J. R. Clark, Roberto J. Avila, Alyssa Guzman +1
Recent analysis of 23 years of Hubble Space Telescope ACS/SBC data has shown that background levels can vary considerably between observations, with most filters showing over an or…
Using 23 Years of ACS/SBC Data to Understand Backgrounds: Significant Reductions in Expected Background Levels
Christopher. J. R. Clark, Roberto J. Avila, Alyssa Guzman +1
We have used 23 years of Hubble Space Telescope ACS/SBC data to study what background levels are encountered in practice and how much they vary. The backgrounds vary considerably,…