Gain determination of non-linear IR detectors with the differential photon transfer curve (dPTC) method

Armin Rest, Bryan Hilbert, Jarron M. Leisenring, Karl Misselt, Marcia J Rieke, Massimo Robberto

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

1 Scopus citations

Abstract

Conversion gain is a basic detector property which relates the raw counts in a pixel in data numbers (DN) to the number of electrons detected. The standard method for determining the gain is called the Photon Transfer Curve (PTC) method and involves the measurement the change in variance as a function of signal level. For non-linear IR detectors, this method depends strongly on the non-linearity correction and is therefore susceptible to systematic biases due to calibration issues. We have developed a new, robust, and fast method, the differential Photon Transfer Curve (dPTC) method, which is independent of non-linearity corrections, but still delivers gain values similar in precision but higher in accuracy.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
PublisherSPIE
Volume9904
ISBN (Electronic)9781510601871
DOIs
StatePublished - 2016
EventSpace Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave - Edinburgh, United Kingdom
Duration: Jun 26 2016Jul 1 2016

Other

OtherSpace Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
CountryUnited Kingdom
CityEdinburgh
Period6/26/167/1/16

Keywords

  • Gain
  • JWST
  • NIR detectors
  • NIRCam

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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  • Cite this

    Rest, A., Hilbert, B., Leisenring, J. M., Misselt, K., Rieke, M. J., & Robberto, M. (2016). Gain determination of non-linear IR detectors with the differential photon transfer curve (dPTC) method. In Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave (Vol. 9904). [99045U] SPIE. https://doi.org/10.1117/12.2233203