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link to STScI page

On April 13, 2015 archive account management will transition to a new STScI account management system. Some people will receive email about how this change affects their account(s). For more information about these changes click here.

MAST Web Tutorial

The MAST Web Tutorial has become out-of-date and is temporarily offline until updates can be completed. Questions about the MAST web site can be sent to the help desk via e-mail at or call 410-338-4443.

We apologize for the inconvenience.