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Extraction of the frequency spectrum of the noise of a HAWAII2RG NIR detector and impact on low-flux measurements

Abstract : In the context of the SNAP / JDEM project, we present here a study of the noise frequency spectrum of a HAWAII2RG near-infrared detector. The variation of the noise as a function of the number of Fowler samples and their frequency is measured. The algebraic relation connecting the observed dependence to the frequency spectrum of the noise, parametrised as A + B/f^a is derived. An adjustment is done to extract the amplitudes of the white and power part of the noise spectrum. A simulation allows to compare the founded power spectrum of the noise to observations taken in different experimental conditions, with exposure times extending from 300s to 6000s.
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http://hal.in2p3.fr/in2p3-00506548
Contributor : Danielle Cristofol <>
Submitted on : Wednesday, July 28, 2010 - 11:00:26 AM
Last modification on : Tuesday, November 19, 2019 - 2:43:22 AM

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  • HAL Id : in2p3-00506548, version 1

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G. Smadja, C. Cerna, A. Castera, A. Ealet. Extraction of the frequency spectrum of the noise of a HAWAII2RG NIR detector and impact on low-flux measurements. SPIE Astronomical Instrumentation 2010, Jun 2010, San-Diego, United States. ⟨in2p3-00506548⟩

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