semaphore is a software page designed to create and interpret the SDSS-V Targeting Flags. These flags identify the origin of the targeting for any given source in SDSS-V. These flags are stored in the pipeline outputs as byte arrays and can be filtered to select targets chosen by different cartons.
Nomenclature:
- label: the concatenated name and version of the carton
- bit: the bit within the flags that is set when this carton is used
- carton_pk: the primary key associated with this carton in the sdssdb
- program: the SDSS-V program associated with the carton
- name: the name of the carton
- version: the version of the carton (0.1.0 – plates, 0.5.* – early FPS data)
- mapper: the mapper associated with the carton (MWM, BHM)
- alt_program: An alternative human-readable version of the program
- alt_name: An alternative human-readable version of the carton name
These flags can be used to select data based on targeting information or determine the targeting information about a specified target. This functionality is illustrated in a tutorial: SDSS-V_targeting_flags