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Greetings and Introduction


Welcome to the Hubble Source Catalog (HSC) Catalog Archive Server Jobs System (CasJobs) service.

The HSC combines tens of thousands of Hubble Legacy Archive source lists into a single Master Catalog.

There are three basic ways to access the HSC database:

  • The primary tool for accessing the HSC is the MAST Discovery Portal
  • For larger and more detailed queries, you may need to use the HSC CasJobs service described below.
  • For certain detailed queries, you may need to use the HSC Home Page
  • Here are Five things you should know about the HSC before you begin.

    We recommend running through the CasJobs Use Case

    About CasJobs

    The purpose of CasJobs is to permit large queries, phrased in the Structured Query Language (SQL), to be run in batch queue. A Quick run button on the open "Query" page is provided to test submission syntax.

    Knowing SQL helps, but if you don't know SQL, you can Google "SQL tutorials". This implementation of CasJobs is designed for you to "fake it".

    Casjobs also provides a personal database (i.e. myDB) facility where you can store output from your queries and save stored procedures and functions. This powerful aspect of Casjobs can also be used as a group sharing facility with your collaborators.

    For more details about CasJobs syntax and a brief view into the full power of Casjobs, see HSC Casjobs guide , HSC CasJobs FAQ and SDSS Casjobs FAQ can also be helpful.

    4. Acknowledgements

    CasJobs was originally developed by the Johns Hopkins University/ Sloan Digital Sky Survey (JHU/SDSS) team. With their permission, MAST used version 3.5.16 to construct three CasJobs-based tools for GALEX, Kepler, and the HSC.

    Acknowledgements of the use of CasJobs in publications should note its authorship by the JHU/SDSS team and list the original site as http://casjobs.sdss.org/CasJobs.