Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· arXiv e-print (arXiv:astro-ph/0401379)
· References in the article
· Citations to the Article (11) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Nonlinearity Corrections and Statistical Uncertainties Associated with Near-Infrared Arrays
Authors:
Vacca, William D.; Cushing, Michael C.; Rayner, John T.
Affiliation:
AA(SOFIA-USRA, NASA Ames Research Center, MS 144-2, Moffett Field, CA 94035, and Department of Astronomy, 601 Campbell Hall, University of California, Berkeley, CA 94720; ), AB(Institute for Astronomy, University of Hawai`i, 2680 Woodlawn Drive, Honolulu, HI 96822; , ), AC(Institute for Astronomy, University of Hawai`i, 2680 Woodlawn Drive, Honolulu, HI 96822; , )
Publication:
The Publications of the Astronomical Society of the Pacific, Volume 116, Issue 818, pp. 352-361. (PASP Homepage)
Publication Date:
04/2004
Origin:
UCP
PASP Keywords:
Instrumentation: Detectors, Methods: Data Analysis
DOI:
10.1086/382906
Bibliographic Code:
2004PASP..116..352V

Abstract

We derive general equations for nonlinearity corrections and statistical uncertainty (variance) estimates for data acquired with near-infrared detectors employing correlated double sampling, multiple correlated double sampling (Fowler sampling), and uniformly spaced continuous readout techniques. We compare our equation for the variance on each pixel associated with Fowler sampling with data taken with the array installed in the near-infrared cross-dispersed spectrograph (SpeX) at the NASA Infrared Telescope Facility and find that it provides an accurate representation of the empirical results. This comparison also reveals that the read noise associated with a single readout of the SpeX array increases with the number of nondestructive reads, nr, as n0.16r. This implies that the effective read noise of a stored image decreases as n-0.34r, shallower than the expected rate of n-0.5r. The cause of this read noise behavior is uncertain but it may be due to heating of the array as a result of the multiple readouts. Such behavior may be generic to arrays that employ correlated or multiple correlated double sampling readouts.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints