Row and column artifacts in JWST MIRI's Si:As blocked impurity band detectors

Daniel Dicken, George Rieke, Mike Ressler, Jane Morrison, Macarena Garcia Marin, Ioannis Argyriou, Karl D. Gordon, Mike Regan, Christophe Cossou, Andras Gaspar, Alistair Glasse, Pierre Guillard, Alvaro Labiano, Gillian Wright

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


The JWST Mid-Infrared Instrument (MIRI) detector arrays are Si:As blocked impurity band devices, direct descendants of the Spitzer/IRAC long wavelength arrays. Similarly to the IRAC row-column effect, analysis of flight-like MIRI detector data has shown that columns and rows in which source signals are located can suffer from pull up (brightness increase) or pull down (brightness decrease) in the flux image. Here we present results from the JPL MIRI detector characterisation campaigns dedicated to understanding this row-column effect as well as the first results showing the effect in the flight detectors for MIRI. We show the effect is flux dependent and confirm that the effect manifests differently for rows versus columns. We discuss the origin of the flux offset, which is related to a change in the signal output in time that distorts the input ramp as a function of the saturation level of illuminated pixels. We conclude by discussing the row-column effect in the context of different MIRI instrument modes and present preliminary proposals to mitigate and/or correct the effect in MIRI data.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2022
Subtitle of host publicationOptical, Infrared, and Millimeter Wave
EditorsLaura E. Coyle, Shuji Matsuura, Marshall D. Perrin
ISBN (Electronic)9781510653412
StatePublished - 2022
EventSpace Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave - Montreal, Canada
Duration: Jul 17 2022Jul 22 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSpace Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave


  • JWST
  • MIRI
  • detectors
  • infrared

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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