About the SDSS What is the Sloan Digital Sky Survey? The Sloan Digital Sky Survey is an ongoing astronomy project that has been working since 1998 to make a detailed map of the universe, including our Milky Way galaxy. What data does SDSS have? What can SDSS tell me about the sky? The SDSS releases […]
Search Results for: SDSS-IV
DR19 Using Bitmasks
A bit mask uses the bits in the binary representation of an integer as “toggles” to indicate whether certain conditions are met. For a more general introduction to this concept, consult Wikipedia or other online resources on the subject. Within the SDSS, the most common use of a bitmask is to indicate the status of […]
DR19 Plates
Plates in the SDSS context are round pieces of aluminum with holes in them to plug the fibers that collect the light from each astrophysical object. From 1999 through 2021, SDSS used these plug plates to perform our observations. These plates needed to be designed and drilled with a few months in advance so that […]
DR19 Software Pipelines
Current Pipelines In SDSS-V DR19, we have data from the BOSS, APOGEE, and LVMi instruments processed through several automated pipelines. The following table lists the current SDSS pipelines: Pipeline Instrument Mapper APOGEE Reduction Pipeline APOGEE MWM BOSS Reduction Pipeline (IDLspec2D) BOSS BHM, MWM LVM Data Reduction Pipeline LVMi LVM ASTRA Data Analysis Pipeline BOSS+APOGEE MWM […]
DR19 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 […]
DR19 Completed Spectroscopic Surveys
The Sloan Digital Sky Survey started routine observing in 2000, and since then has completed 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 19. The following is a list of all the […]
DR19 Tutorials
Welcome to the SDSS tutorial section. This section contains a series of hands-on tutorials to learn how to work with different aspects of the SDSS data. If you are unsure what kind of SDSS data or which SDSS survey is best for your science, then go the the mapper overview page: this page contains short […]
Data Release 19
DR19 is the second data release for the fifth phase of the Sloan Digital Sky Survey (SDSS-V). Its content is described in detail on the DR19 data release paper. DR19 includes the following: Access to the DR19 data products is described on this page, while the Black Hole Mapper, Milky Way Mapper, and Local Volume […]
DR19 BHM Caveats
On this page we document a number of known issues with the BOSS data released in SDSS DR19 Targeting Caveats Missing MOS Target Cartons and Semaphore Flag Descriptions In DR19, there are some cartons included in the semaphore SDSS-V Targeting Flags definitions that are not included in the mos_target product or the tables loaded into […]
DR19 Reverberation Mapping
Summary The SDSS-V/BHM Reverberation Mapping (RM) project seeks to measure the time lag between variability signals in the quasar continuum and the response/echo from the broad emission lines, and hence make virial black hole (BH) mass estimates; aiming for a large and uniformly selected sample of quasars across a wide range of luminosities and redshifts. […]