ARIEL Selected as M4 mission by ESA

ARIEL (Atmospheric Remote-sensing Exoplanet Large-survey) is one of the three candidate missions selected by the European Space Agency (ESA) for its next medium-class science mission (M4) due for launch in 2028 (see the official ESA announcement). There is no doubt

First article describing an ERS programme published in “astro-ph” to appear in PASP.

The first scientific article describing an ERS programme has been published in “astro-ph”, on March 15th, 2018, and will appear in the Publications of the Astronomical Society of the Pacific.  Jacob Bean and collaborators (among which are included several members

NEW APT (25.4.3) released

APT 25.4.3 was released on February 20, 2018. This is a minor release dealing mainly on proposal processing performance enhancements. The new version is recommended for all JWST proposers, but especially those preparing Solar System proposals. APT 25.4.3 contains the

All the JWST components now at NGAS

All JWST flight hardware arrived at Northrop Grumman Aerospace Systems (NGAS), at Redondo Beach, Los Angeles, California, on February 2nd, 2018. OTIS should come out of Transport box the first week of March and put into NGAS clean room. Post

Workshop JWST for the French community

The deadline for observing time with the JWST, April 6th, is coming soon. In order to continue preparing the French community for the best scientific use of the offered capabilities on-board the JWST, a workshop will be held at the

APT 25.4.2 and ETC Released

December 18, 2017: APT 25.4.2 and ETC 1.1 Released APT version 25.4.2 has been formally released. You can download a copy  from   You can read What’s New on, and watch training videos on In addition, JWST ETC version

GTO Programmes released

Guaranteed Time Observations (GTO) reward both individuals and teams of scientists who were selected to deliver of key hardware and software components, or technical and inter-disciplinary knowledge for JWST. The program provides a total of about 16% use of the

Release of the JWST DD ERS Call for Proposals

The STScI Director will make up to 500 hours of Director’s Discretionary time available for early release science, and resources are allocated to support up to 15 teams. The primary purpose of the Director’s Discretionary Early Release Science (DD ERS)

Guaranteed Time Observations (GTO)

Approximately 16% of the observing time over the first three cycles will be allocated to Guaranteed Time Observers, including the Principal Investigators of the four science instruments, the U.S. MIRI Science Lead and Science Team members and the six Interdisciplinary

Release of updated tools

Several JWST community oriented products and tools had been launched at the January 2017 AAS meeting and provided the following links to the main elements: JDOX: ETC: ERS CfP: JWST Help Desk: