Pixel classification for the JWST fine guidance sensor

Neil Rowlands; Gerry Warner; Charles Berndt; Loic Albert; Pierre Chayer

doi:10.1117/12.926678

25 September 2012 Pixel classification for the JWST fine guidance sensor

Neil Rowlands, Gerry Warner, Charles Berndt, Loic Albert, Pierre Chayer

Proceedings Volume 8453, High Energy, Optical, and Infrared Detectors for Astronomy V; 845313 (2012) https://doi.org/10.1117/12.926678
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The James Webb Space Telescope Fine Guidance Sensor makes use of three 2048x2048 five micron cutoff HAWAII-2RG HgCdTe detectors from Teledyne Imaging Systems. The FGS consists of two Guider channels and a Near-InfraRed Imager and Slitless Spectrograph (NIRISS) channel. We report here on the characterization of the flight detectors at the sub-system level and after integration to the flight instrument. The FGS-Guider has a number of unique readout modes which are required to support observatory operations. Of critical importance is the identification and classification of pixels which, if left unmasked or unprocessed, would compromise the guider performance. We report on these classification methods and on the detailed behaviour of key bad pixel types which can impact guider performance.

Citation Download Citation

Neil Rowlands, Gerry Warner, Charles Berndt, Loic Albert, and Pierre Chayer "Pixel classification for the JWST fine guidance sensor", Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 845313 (25 September 2012); https://doi.org/10.1117/12.926678

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