Release Timeline
Data had been hosted on multiple platforms in an effort to serve large amounts of data to a wide audience in a timely way. All public JWST data are now available through the MAST Portal.
Program Categories
Data from the following categories of programs have been made available in MAST. :
Abbr | Program Type | Access | Notes |
---|---|---|---|
CAL | Calibration | Public | Cycle 1 program to collect data for calibrating science instruments. Some include observations of external targets. |
COM | Commissioning | Public | Observations obtained in the first 6 months of flight to characterize and adjust telescope and instrument functionality and performance. |
DD | Director's Discretion | Public | Off-cycle grants of urgent observations. |
ENG | Engineering | Public | Non-standard observations meant to characterize instrument health and functionality. |
ERO | Early Release Observations | Public | Webb First Science data that illustrate the capabilities of JWST and the science instruments. |
ERS | Early Release Science | Public | Cycle 1 programs that will execute early. |
GO/GTO | Guest/Guaranteed-Time Observer | EAP+Public | Cycle 1 programs, a few of which have immediate public access. |
User Support
For MAST user support, contact the HelpDesk: archive@stsci.edu. See the Archive Support page for details and other resources.
Please acknowledge the use of data obtained from MAST in publications.