Reducing the read noise of HAWAII-2RG detector systems with improved reference sampling and subtraction (IRS2)

Bernard J. Rauscher; Richard G. Arendt; D. J. Fixsen; Matthew Lander; Don Lindler; Markus Loose; S. H. Moseley; Donna V. Wilson; Christos Xenophontos

doi:10.1117/12.926089

25 September 2012 Reducing the read noise of HAWAII-2RG detector systems with improved reference sampling and subtraction (IRS²)

Bernard J. Rauscher, Richard G. Arendt, D. J. Fixsen, Matthew Lander, Don Lindler, Markus Loose, S. H. Moseley, Donna V. Wilson, Christos Xenophontos

Author Affiliations +

Proceedings Volume 8453, High Energy, Optical, and Infrared Detectors for Astronomy V; 84531F (2012) https://doi.org/10.1117/12.926089
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

IRS² is a Wiener-optimal approach to using all of the reference information that Teledyne’s HAWAII-2RG (H2RG) detector array provides. Using a new readout pattern, IRS² regularly interleaves reference pixels with the normal pixels during readout. This differs from conventional clocking, in which the reference pixels are read out infrequently, and only in a few rows and columns around the outside edges of the detector array. During calibration, the data are processed in Fourier space, which is close to the noise’s eigenspace. Using IRS², we have reduced the read noise of the James Webb Space Telescope (JWST) Near Infrared Spectrograph’s (NIRSpec) H2RGs by 15% compared to conventional readout. We are attempting to achieve further gains by calibrating out a recently recognized non-stationary noise component that appears at the frame rate. Teledyne’s new HAWAII- 4RGs (H4RG) build in a flexible capability to interleave reference pixels. We eagerly look forward to applying IRS² techniques to H4RGs when the opportunity arises.

Citation Download Citation

Bernard J. Rauscher, Richard G. Arendt, D. J. Fixsen, Matthew Lander, Don Lindler, Markus Loose, S. H. Moseley, Donna V. Wilson, and Christos Xenophontos "Reducing the read noise of HAWAII-2RG detector systems with improved reference sampling and subtraction (IRS²)", Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 84531F (25 September 2012); https://doi.org/10.1117/12.926089

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