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As of April 13, the archive is now using the STScI Single Sign-On (SSO) identity manager. To check on your account click here. For more information about how accounts were transitioned click here.

Data Use Policy

Public Data Use Policy

Data retrieved from the Mikulski Archive for Space Telescopes (MAST) are part of the public domain and need no explicit permission for use, with the exception of proprietary data. We take care that these proprietary data are only provided to those who have proprietary rights. No explicit permission is needed for the use of MAST tools. Please acknowledge NASA and MAST when using data retrieved from MAST.

Publication of Archival Research Results

Although there is no cost involved in retrieving data from MAST, researchers are requested to include an acknowledgment (as shown below) in any publications that make use of data obtained from MAST:

"Some/all of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts."

In addition, publications of research supported by an STScI grant must carry the following acknowledgment:

"Support for this work was provided by NASA through grant number ________ from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555."

Note for Kepler/K2 Users:

Publications based on data obtained from the Kepler project are requested to include the additional acknowledgment:

"This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate."

Note for HLA Users:

All refereed publications based on data obtained from the Hubble Legacy Archive (HLA) are requested to carry the following footnote:

"Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the European Space Agency (ST-ECF/ESAC/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA)."

HSC Users:

The Hubble Source Catalog (HSC) is based on data from the Hubble Legacy Archive (HLA). Refereed publications making use of the HSC should therefore include the above footnote for HLA users. Authors are also asked to acknowledge the "Hubble Source Catalog" in the text of the paper, and consider a reference to the Whitmore et al. (2015 – see the HSC FAQ) paper describing the HSC.

GSC Data Copyrights, Data Use Policy, Acknowledgments

Please see the links below regarding Guide Star Catalog (GSC) usage:

Digital Sky Survey (DSS) Users