The Fourth Data Release of the Sloan Digital Sky Survey

Details The Fourth Data Release of the Sloan Digital Sky Survey The Fourth Data Release of the Sloan Digital Sky Survey

2005-07-29

arxiv.org/abs/astro-ph/0507711v1

Astrophys.J.Suppl.162:38-48,2006

Astronomy and Astrophysics

Astrophysics

26 pages, 2 figures

Scientific paper

10.1086/497917

This paper describes the fourth data release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through June 2004. The data release includes five-band photometric data for 180 million objects selected over 6670 deg^2, and 673,280 spectra of galaxies, quasars, and stars selected from 4783 deg^2 of that imaging data using the standard SDSS target selection algorithms. These numbers represent a roughly 25% increment over those of the Third Data Release. The Fourth Data Release also includes an additional 131,840 spectra of objects selected using a variety of alternative algorithms, to address scientific issues ranging from the kinematics of stars in the Milky Way thick disk to populations of faint galaxies and quasars.

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