The two identical BOSS spectrographs were rebuilt from the original SDSS spectrographs. Each spectrograph has two cameras, one red and one blue, with a dichroic splitting the light at roughly 6000 Angstroms. The BOSS spectrographs were custom designed for BOSS, an SDSS-III spectroscopic survey that measured redshifts of 1.5 million luminous red galaxies and Lyman-alpha […]
Search Results for: SDSS-IV
APOGEE Spectrographs
The APOGEE Northern and Southern Spectrographs APOGEE-1 and APOGEE-2 constituted a high-resolution, near-infrared spectroscopic survey of several hundred thousand stars in the Milky Way Galaxy. Spectra are observed with custom-built, multi-object spectrographs, which record the spectra of 300 targets simultaneously across the H-band wavelength regime with an approximate resolution of 22,500. The APOGEE spectrographs are […]
Mappers
SDSS-V is an all-sky, multi-epoch spectroscopic survey that will yield optical and IR spectra of over 6 million objects during its seven year lifetime (2020-2027). Using SDSS’s existing and anticipated new facilities at Apache Point and Las Campanas Observatories, SDSS-V will survey the entire sky — mapping the Milky Way using rapid, repeated observations, mapping […]
Glossary of SDSS Terminology
This Glossary is a work in progress, and more terms will be added during the lifetime of SDSS-V. If you have come across SDSS Terminology that is not explained yet in the Glossary below, then please let us know via the SDSS Helpdesk at helpdesk@sdss.org. ABCDEFGHIJKLMNOPQRSTUVWXYZ A Adaptive Moment A method of measuring object shapes […]
BHM Overview
Black Hole Mapper (BHM) emphasizes the study of quasars/AGN, as among Universe’s most luminous objects, powered by accretion onto supermassive black holes (SMBHs), and co-evolving via feedback with the host galaxies in which they reside. BHM exploits – with order(s) of magnitude advances – two hallmark characteristics of quasars: their marked variability on a range […]
Completed Spectroscopic Surveys
The Sloan Digital Sky Survey started routine observing in 2000, and since then has gone through four generations of surveys. The current generation is the Fifth Generation of Sloan Digital Sky Surveys (SDSS-V), and the data of its mapper programs can be found in Data Release 18. The following is a list of all the […]
Imaging
The SDSS imaging camera took its first science quality data the night of September 19, 1998, and was the world’s most productive wide-field imaging facility until its last night of science quality data on November 18, 2009. In between it took a total of around 35,000 square degrees of images, covering a unique footprint of […]
DR18 Data Access Overview
Data Products DR18 contains SDSS-V targeting catalogs, prepared for the Black Hole Mapper and Milky Way Mapper science programs, as well as for open fiber programs. Collectively all these programs are know as MOS (multi-object spectroscopy) programs. These target catalogs use several imaging and spectroscopic surveys as input, including optical and infrared data taken with […]
Data Release 18
DR18 is the first data release for the fifth phase of the Sloan Digital Sky Survey (SDSS-V). Its content is described in detail on the DR18 data release paper Almeida et al. (2023). DR18 includes the following: Access to the DR18 data products is described on this page, while the Black Hole Mapper and Milky […]
Contact Us
For questions about using the data, please consult the latest Data Release’s help page, and if necessary the help desk contact listed there. Questions about this web site should be directed to webmaster@sdss.org. Contacting SDSS-V For more information about the SDSS-V collaboration (2020-),please contact: Director Juna KollmeierCarnegie Observatoriessdss5-director@sdss.org Project Scientist Hans-Walter RixMax-Planck-Institut für Astronomie, Heidelbergsdss5-projectscientist@sdss.org Scientific Spokesperson […]