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1 Based on observations obtained with the Sloan Digital Sky Survey, and with the Apache Point Observatory 3.5-meter telescope, which is owned and operated by the Astrophysical Research Consortium; with the MMT Observatory, a joint facility of the University of Arizona and the Smithsonian Institution; with the University of Arizona 2.3-meter Bok Telescope;(More)
We present a catalog of 9316 spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey Data Release 4. We have selected the stars through photometric cuts and spectroscopic modeling, backed up by a set of visual inspections. Roughly 6000 of the stars are new discoveries, roughly doubling the number of spectroscopically confirmed white(More)
We describe the design, construction, and performance of the Sloan Digital Sky Survey Telescope located at Apache Point Observatory. The telescope is a modified two-corrector Ritchey-Chrétien design which has a 2.5-m, f /2.25 primary , a 1.08-m secondary, a Gascoigne astigmatism corrector, and one of a pair – 2 – of interchangeable highly aspheric(More)
We present ugriz photometry and optical spectroscopy for 28 DB and DO white dwarfs with temperatures between 28,000K and 45,000K. About 10 of these are particularly well-observed; the remainder are candidates. These are the hottest DB stars yet found, and they populate the " DB gap " between the hotter DO stars and the familiar DB stars cooler than 30,000K.(More)
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed-up with either the Subaru or the Isaac Newton Telescopes. They include four probable new dwarf galaxies – one each in the constellations of Coma Berenices, Canes Venatici, Leo and Hercules – together with one unusually(More)
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through June 2005 and represents the completion of the SDSS-I project (whose successor, SDSS-II will continue through mid-2008). It includes five-band photometric data for 217 million objects selected over 8000 deg 2 , and(More)
We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The catalog consists of the objects in the SDSS Fifth Data Release that have luminosities larger than M i = −22.0 (in a cosmology with H 0 = 70 km s −1 Mpc −1 , Ω M =(More)