DR20 includes newly released information about targets that BHM selected for observation during the first ~half of FPS operations at APO and LCO (up to Feb 2025). In addition, DR20 incorporates all BHM targeting information that was previously released in DR19 and DR18, including initial BHM target selection supporting the first year of plug-plate operations at APO, and target selection for early FPS observations.
The BHM science programs are presented on the BHM programs page (and child pages). The BHM target selection algorithms are described on the BHM target cartons page. The SDSS-V catalog/target database ecosystem is described on the Targeting page. Methods to access the targeting catalogs are described on the Data Access page.