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The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of the distribution of luminous and non-luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of π steradians above about Galactic latitude 30 • in five broad optical bands to a depth of g ′ ∼ 23 m , and a(More)
The Sloan Digital Sky Survey has validated and made publicly available its First Data Release. This consists of 2099 square degrees of five-band (u g r i z) imaging data, 186,240 spectra of galaxies, quasars, stars and calibrating blank sky patches selected over 1360 square degrees of this area, and tables of measured parameters from these data. The imaging(More)
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(More)
An architecture-flow diagram extension to the Teamwork dataflow diagramming tool is described. The extension, called TWKAFD, manages FIG format files representing architecture-flow and interconnect diagrams and invokes the X Window version of FIG to let designers graphically edit them. Designers edit the diagrams using simple drawing primitives instead of(More)
1 2 SDSS QUASARS ABSTRACT We present photometric and spectroscopic observations of 15 high-redshift quasars (z > 3:6) discovered from 140 deg 2 of ve-color (u 0 g 0 r 0 i 0 z 0) imaging data taken by the Sloan Digital Sky Survey (SDSS) during its commissioning phase. The quasars are selected by their distinctive colors in SDSS multicolor space. Four of the(More)
As part of its expanding Antrophysica program, Fermilab is participating in the Digital Sky Survey (DSS). Fermiiab is part of a collaboration involving University of Chicago, Princeton University, and the Institute of Advanced Studies (at Princeton). DSS main results will be a photometric imaging survey and a redsbift survey of galaxies and color-selected(More)
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