2MASS Extended Source Catalog: Overview and Algorithms

Details 2MASS Extended Source Catalog: Overview and Algorithms 2MASS Extended Source Catalog: Overview and Algorithms

2000-04-21

arxiv.org/abs/astro-ph/0004318v1

Astron.J. 119 (2000) 2498-2531

Astronomy and Astrophysics

Astrophysics

Astronomical Journal, in press. See http://spider.ipac.caltech.edu/staff/jarrett/papers/2mass/paperI.html

Scientific paper

10.1086/301330

The 2 Micron All-Sky Survey (2MASS) will observe over one-million galaxies and extended Galactic sources covering the entire sky at wavelengths between 1 and 2 microns. The survey catalog will have both high completeness and reliability down to J = 15.0 and Ks = 13.5 mag, equivalent to 1.6 mJy and 2.9 mJy, respectively. This paper describes the basic algorithms used to detect and characterize extended sources in the 2MASS database and catalog. Critical procedures include tracking the point spread function, image background removal, artifact removal, photometry and basic parameterization, star-galaxy discrimination and object classification using a decision tree technique. Examples of extended sources encountered in 2MASS are given.

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