Table of Contents
Data were released in stages, as depicted in the graphic below. Data are hosted on multiple platforms in an effort to serve large amounts of data to a wide audience in a timely way.
Data from CAL, DD, ENG, ERS, and GO/GTO are bundled under "Cycle-1" programs in the timeline above. Exclusive access periods for GO/GTO data will continue to be enforced where applicable.
Data from the following categories of programs will be made available in MAST (and in two cases, Amazon Web Services):
|CAL||Calibration||Public||Cycle 1 program to collect data for calibrating science instruments. Some include observations of external targets.|
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.|
Use AWS for Data Retrievals
We strongly recommend that you retrieve data from the AWS S3 bucket if available. This will off-load network traffic from STScI, and will offer higher availability and throughput for data transfers. Datasets on AWS are the ERO science data and the Commissioning (COM) data. The volume of all COM data approaches 150 TB.