Sub-Pixel Response Measurement of Near-Infrared Sensors

Details Sub-Pixel Response Measurement of Near-Infrared Sensors Sub-Pixel Response Measurement of Near-Infrared Sensors

2006-11-10

arxiv.org/abs/astro-ph/0611339v1

Publ.Astron.Soc.Pac.119:466-475,2007

Astronomy and Astrophysics

Astrophysics

9 pages, 13 figures, submitted to PASP

Scientific paper

10.1086/517620

Wide-field survey instruments are used to efficiently observe large regions of the sky. To achieve the necessary field of view, and to provide a higher signal-to-noise ratio for faint sources, many modern instruments are undersampled. However, precision photometry with undersampled imagers requires a detailed understanding of the sensitivity variations on a scale much smaller than a pixel. To address this, a near-infrared spot projection system has been developed to precisely characterize near-infrared focal plane arrays and to study the effect of sub-pixel non uniformity on precision photometry. Measurements of large format near-infrared detectors demonstrate the power of this system for understanding sub-pixel response.

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