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SDSS SCIENCE ARCHIVE SERVER (SAS)

 * SAS for experts
 * About Data Access

 * SDSS Wiki

 * Home
 * Imaging
   * Field Search
   * Coverage Check
   * Mosaics
 * Optical Spectra
   * Plate Search
   * Spectrum Search
   * Spectrum View
   * Data Access API
 * Infrared Spectra
   * Plate Search
   * Spectrum Search
   * Spectrum View Visits
   * Spectrum View Stars
   * Data Access API
 * MaStar Spectra
   * Spectrum Search
   * Spectrum View
 * 

 * DR17
   * DR18
   * DR17
   * DR16
   * DR15
   * DR14
   * DR13
   * DR12
   * DR11
   * DR10
   * DR9
   * DR8


SDSS IMAGING


OPTICAL SPECTROSCOPY


INFRARED SPECTROSCOPY


Welcome to the Sloan Digital Sky Survey Science Archive Server (SAS). The SDSS
is a large imaging and spectroscopic survey of the Northern sky, using the Sloan
Foundation 2.5m optical telescope at Apache Point Observatory in New Mexico, and
is currently being extended to the Southern Sky, using the 2.5m Du Pont optical
telescope at Las Campanas Observatory in Chile. The SAS serves images and
spectra generated by the survey to astronomers and the general public alike.
Please see the main survey site for full details and documentation.

The main goal of SAS is to serve the binary image files and full spectroscopic
results (i.e., flux versus wavelength). For catalogs and derived parameters, we
recommend instead using the the SDSS SkyServer and the associated CASJobs
database.

Links on the menu above will guide you through the SAS tools for finding,
displaying and downloading images and spectra. Understanding the basics of SDSS
imaging, optical spectroscopy and infrared spectroscopy is crucial for using
these tools sensibly. Example images and spectra are above, with links into the
SAS pages that search for them.

The SAS also provides direct links into the directory tree containing the full
DR17 data set in the form of flat files. These files are only for the real
experts! Please see the data access tools documentation as well as the data
model for full details. The SDSS Wiki button (at the top right of this page)
provides the wiki documention including topics related to proprietary SDSS data
which is not yet included in a data release, but you do not need to an approved
SDSS wiki account to access the current data release.

An application programmatic interface (API) is also available to provide access
to the data. This API allows you to directly download a single spectrum,
supporting multiple formats including fits and csv. Full details and examples
are available for Optical Spectrum Data Access API, and Infrared Spectrum Data
Access API.

Copyright © 2010-2023 SDSS

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