David Martínez-Delgado

TL;DR: A series of improvements to the spectroscopic reductions are described, including better flat fielding and improved wavelength calibration at the blue end, better processing of objects with extremely strong narrow emission lines, and an improved determination of stellar metallicities.

TL;DR: The Sloan Extension for Galactic Understanding and Exploration (SEGUE) Survey as mentioned in this paper obtained approximately 240,000 moderate-resolution spectra from 3900 to 9000 of fainter Milky Way stars (14.0 10 per resolution element).

TL;DR: The fourth data release of the Sloan Digital Sky Survey (SDSS) as discussed by the authors includes all survey-quality data taken through 2004 June, including five-band photometric data for 180 million objects selected over 6670 deg2 and 673,280 spectra of galaxies, quasars and stars selected from 4783 deg2 of those imaging data using the standard SDSS target selection algorithms.

TL;DR: The Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS) was released in 2005 June and represents the completion of the SDSS-I project as mentioned in this paper, which includes five-band photometric data for 217 million objects selected over 8000 deg 2 and 1,048,960 spectra of galaxies, quasars, and stars selected from 5713 deg 2 of imaging data.

TL;DR: The Third Data Release of the Sloan Digital Sky Survey (SDSS) as mentioned in this paper contains data taken up through 2003 June, including imaging data in five bands over 5282 deg2, photometric and astrometric catalogs of the 141 million objects detected in these imaging data, and spectra of 528,640 objects selected over 4188 deg2.