Screenshot of MAST's Data Discovery Portal
FEBRUARY 13, 2018

Use MAST’s New Feature to Search for Planned JWST Observations

The Mikulski Archive for Space Telescopes (MAST) has added a new feature to the Data Discovery Portal, which allows users to search for planned JWST observations, including those requested in Guaranteed Time Observation (GTO) programs and Director's Discretionary Early Release Science (DD-ERS) programs. As with other Portal queries, users are able to cross-match these results with other STScI missions to explore what data are already available for the targets and fields in question. 

The MAST Discovery Portal can help with JWST duplication checking. Observations that duplicate planned GTO or ERS observations must be justified scientifically. To avoid unintentional duplications, JWST investigators will be required to check their proposed observations against those already approved. The Portal offers a convenient way to identify potential duplications of targets before submitting a JWST proposal, but it does not offer a complete specification of planned observations. Any potentially duplicate targets should therefore still be inspected in detail by downloading the approved APT file for the relevant programs using the program information tool. The final responsibility for duplication checking rests with each proposer.

Additional information on duplication checking and the duplication policy for JWST may be found on JDox. Read the latest issue of the MAST newsletter for more information.

For technical assistance, please contact the JWST Help Desk.

The NASA James Webb Space Telescope, developed in partnership with ESA and CSA, is operated by AURA’s Space Telescope Science Institute.