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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.

Archive Registration

Who may register?

Anyone can obtain a MAST user's account and download data, including astronomical researchers, amateurs, educators, and the general public. However, general users should be aware that the archive contains data, not pictures. The format of the data may not be compatible with most personal computer systems as the data are intended for professional astronomical analysis. HST images in formats which are more easily displayed (e.g., GIF, JPEG, and TIFF) are available from the STScI Office of Public Outreach.

Do I need to register?

HST Observers MUST register in order to retrieve their proprietary data. (Registration for FUSE and Kepler data is no longer required, since all data is now public.)

Registration is optional if you wish to retrieve only public data. HST data typically remain proprietary to the original investigators for a year. All other data in the MAST archive are public. Public data can be retrieved using the username anonymous, and using your email address as the password. A valid email address is required so that you can be informed when your request has completed.

How does MAST use the information I provided when I registered?

We use the contact information provided by users on the registration form in case we need to contact them about the status of their request or for account maintenance. Occasionally, we send out notices to all of our registered users with pertinent information concerning the archive. We also use the information you provide to help us understand our user base, which in turn helps us develop our services accordingly.

How do I register?

To register, simply fill out our WWW Registration Form.

How can I keep my account current?

To request access to proprietary data or if you have any other questions, please contact