Analysis of spectro-imaging data using the Karhunen-Loève expansion: Application to NGC 7027 in the infrared

Details Analysis of spectro-imaging data using the Karhunen-Loève expansion: Application to NGC 7027 in the infrared Analysis of spectro-imaging data using the Karhunen-Loève expansion: Application to NGC 7027 in the infrared

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...418..771m&link_type=abstract

Astronomy and Astrophysics, v.418, p.771-780 (2004)

Astronomy and Astrophysics

Astrophysics

Methods: Data Analysis, Planetary Nebulae: Individual: Ngc 7027

Scientific paper

A method, based on the Karhunen-Loève (KL) transformation, to improve the signal-to-noise ratio of a multispectral data cube is presented. As an illustration we have re-analyzed near-infrared multi-spectral images of the young planetary nebula NGC 7027 previously observed by Cox et al. (\cite{Cox02}). Our KL analysis clearly shows an enhancement of both spectral and spatial information, particularly in the case of low signal-to-noise ratio images.

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