Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 2017 | Submitted
Journal Article Open

Nonlinearity and pixel shifting effects in HXRG infrared detectors


We study the nonlinearity (NL) in the conversion from charge to voltage in infrared detectors (HXRG) for use in precision astronomy. We present laboratory measurements of the NL function of a H2RG detector and discuss the accuracy to which it would need to be calibrated in future space missions to perform cosmological measurements through the weak gravitational lensing technique. In addition, we present an analysis of archival data from the infrared H1RG detector of the Wide Field Camera 3 in the Hubble Space Telescope that provides evidence consistent with the existence of a sensor effect analogous to the "brighter-fatter" effect found in Charge-Coupled Devices. We propose a model in which this effect could be understood as shifts in the effective pixel boundaries, and discuss prospects of laboratory measurements to fully characterize this effect.

Additional Information

© 2017 IOP Publishing Ltd and Sissa Medialab srl. Received 6 February 2017; Accepted 22 March 2017; Published 5 April 2017. We thank J. Anderson, C. Hirata, S. Deustua, J. Kruk, R. Mandelbaum, G. Bernstein, A. Kannawadi, D. Gruen, the Goddard Space Flight Center Detector Characterization Laboratory, and S. Adalsteinsson. We also thank the organizers of the workshop Precision Astronomy with Fully Depleted CCDs 2016, especially A. Nomerotski. AAP is supported by the Jet Propulsion Laboratory. CS, JR, and EH are being supported in part by the Jet Propulsion Laboratory. The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

Attached Files

Submitted - 1703.08205.pdf


Files (903.2 kB)
Name Size Download all
903.2 kB Preview Download

Additional details

August 19, 2023
October 25, 2023