This is the home for MAST User reference documentation. This collection of documents includes new user guides as well as updated and reorganized versions of old documents. The content on these pages features a new look-and-feel, and makes it easier to navigate and search for critical information on: the substantial MAST holdings; interfaces for searching, browsing, and retrieving data; mission-specific tools; and on seeking help when you need it.

Some MAST documentation is still being migrated from the old platform, and will appear here when ready. In the meantime, links to older content will be included here where necessary.

For high-level overviews of MAST missions, catalogs, publishing resources, policies, and other content see the companion MAST Home page.

The available documents now include the following; they are also listed in the navigation panel on the left-hand side of these pages.

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Send comments & corrections on this MAST document to: archive@stsci.edu