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Related papers: WFC3/UVIS EPER CTE 2009-2025

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Most discussion of charge-transfer-efficiency (CTE) losses involves the parallel transfer of charge in the y-direction down the chip columns (y-CTE). Serial charge-transfer efficiency (x-CTE) refers to the horizontal transer of charge.…

Instrumentation and Methods for Astrophysics · Physics 2025-12-16 Jay Anderson

We present a dedicated study of CCD serial ($x$-direction) charge transfer efficiency (CTE) in ACS/WFC. Following past studies of parallel ($y$-direction) CTE, we use the serial CTE trails behind hot pixels in calibration dark frames to…

Instrumentation and Methods for Astrophysics · Physics 2026-02-04 Jenna E. Ryon , Norman A. Grogin

A variety of on-orbit imaging and spectroscopic observations are used to characterize the Charge Transfer Efficiency (CTE) of the Charge-Coupled Device (CCD) of the Space Telescope Imaging Spectrograph (STIS) aboard the Hubble Space…

Astrophysics · Physics 2009-11-11 Paul Goudfrooij , Ralph C. Bohlin , Jesus Maiz-Apellaniz , Randy A. Kimble

Using repeat imaging of a galaxy cluster taken over a seventeen-year baseline, we examine the impact that degraded Charge Transfer Efficiency (CTE) has on photometric measurements of extended sources using the ACS/WFC on HST. We examine how…

Instrumentation and Methods for Astrophysics · Physics 2026-02-24 David V. Stark , M. Chiaberge , N. A. Grogin

Results of detailed simulations of the charge transfer inefficiency of a prototype serial readout CCD chip are reported. The effect of radiation damage on the chip operating in a particle detector at high frequency at a future accelerator…

Instrumentation and Detectors · Physics 2009-11-13 Andre Sopczak

We use an empirical approach to characterize the effect of charge-transfer efficiency (CTE) losses in images taken with the Wide-Field Channel of the Advanced Camera for Surveys. The study is based on profiles of warm pixels in 168 dark…

Instrumentation and Methods for Astrophysics · Physics 2015-05-19 Jay Anderson , Luigi R. Bedin

Radiation damage to space-based Charge-Coupled Device (CCD) detectors creates defects which result in an increasing Charge Transfer Inefficiency (CTI) that causes spurious image trailing. Most of the trailing can be corrected during…

Instrumentation and Methods for Astrophysics · Physics 2015-08-26 Holger Israel , Richard Massey , Thibaut Prod'homme , Mark Cropper , Oliver Cordes , Jason Gow , Ralf Kohley , Ole Marggraf , Sami Niemi , Jason Rhodes , Alex Short , Peter Verhoeve

A new determination of WFPC2 photometric corrections is presented, using HSTphot reduction of the WFPC2 Omega Centauri and NGC 2419 observations from January 1994 through March 2000 and a comparison with ground-based photometry. No evidence…

Astrophysics · Physics 2009-10-31 Andrew E. Dolphin

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 with values $\le$ $-10$ electrons below the local background of…

Instrumentation and Methods for Astrophysics · Physics 2026-03-02 Alyssa M. Guzman , Jenna E. Ryon

We present new observations of the transiting system TrES-3 obtained from 2009 to 2011 at several observatories. The orbital parameters of the system were re- determined and a new linear ephemeris was calculated. The best quality light…

Solar and Stellar Astrophysics · Physics 2015-06-15 M. Vanko , G. Maciejewski , M. Jakubik , T. Krejcova , J. Budaj , T. Pribulla , J. Ohlert , St. Raetz , S. Parimucha , L. Bukowiecki

Photonic integrated circuits (PICs) are vital for developing affordable, high-performance optoelectronic devices that can be manufactured at an industrial scale, driving innovation and efficiency in various applications. Optical loss of…

Optics · Physics 2025-01-22 Mohit Khurana , Sahar Delfan , Zhenhuan Yi

PLATO is designed to detect Earth-sized exoplanets around solar-type stars and to measure their radii with accuracy better than \(2\%\) via the transit method. Charge transfer inefficiency (CTI), a by-product of radiation damage to CCDs,…

Earth and Planetary Astrophysics · Physics 2026-03-18 Shaunak Mishra , Reza Samadi , Diane Bérard

Electrons floating on the surface of liquid helium are possible qubits for quantum information processing. Varying electric potentials do not modify spin states, which allows their transport on helium using a charge-coupled device…

Other Condensed Matter · Physics 2009-11-11 G. Sabouret , S. A. Lyon

Electrons floating on the surface of liquid helium are possible spin-qubits for quantum information processing. Varying electric potentials are not expected to modify spin states, which allows their transport on helium using a…

Other Condensed Matter · Physics 2009-11-13 G. Sabouret , F. R. Bradbury , S. Shankar , S. A. Lyon

Results of detailed simulations of the charge transfer inefficiency of a prototype CCD chip are reported. The effect of radiation damage in a particle detector operating at a future accelerator is studied by examining two electron trap…

Electrochemical impedance spectroscopy (EIS) data is typically modeled using an equivalent circuit model (ECM), with parameters obtained by minimizing a loss function via nonlinear least squares fitting. This paper introduces two new loss…

Machine Learning · Computer Science 2025-10-14 Ali Jaberi , Amin Sadeghi , Runze Zhang , Zhaoyang Zhao , Qiuyu Shi , Robert Black , Zoya Sadighi , Jason Hattrick-Simpers

The pn camera of EPIC is inherently robust against radiation damage effects. Nevertheless, the knowledge of charge transfer inefficiency (CTI) of the pn camera is crucial for obtaining the correct energy scale. We describe detailed in-orbit…

Astrophysics · Physics 2007-05-23 K. Dennerl , U. G. Briel , M. J. Freyberg , F. Haberl , N. Meidinger , V. E. Zavlin

We present a new photometric calibration of the WFC3-UVIS and WFC3-IR detectors based on observations collected from 2009 to 2020 for four white dwarfs, namely GRW+70~5824, GD~153, GD~71, G191B2B, and a G-type star, P330E. These…

Instrumentation and Methods for Astrophysics · Physics 2022-07-20 A. Calamida , V. Bajaj , J. Mack , M. Marinelli , J. Medina , A. Pidgeon , V. Kozhurina-Platais , C. Shanahan , D. Som

During the scheduled high luminosity upgrade of LHC, the world's largest particle physics accelerator at CERN, the position sensitive silicon detectors installed in the vertex and tracking part of the CMS experiment will face more intense…

Instrumentation and Detectors · Physics 2015-01-21 T. Peltola

The current non-linearity correction for the Wide Field Camera 3 Infrared (WFC3/IR) channel is based on ground-based data acquired during WFC3's Thermal Vacuum 3 (TV3) testing campaign. In the current reference file, the correction…

Instrumentation and Methods for Astrophysics · Physics 2025-12-02 Sachindev S. Shenoy , Ky Huynh , Varun Bajaj , Jennifer Mack
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