the JWST user documentation is under development; current versions are preliminary and subject to revision.

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JWST Astronomers Proposal Tool

The Astronomer's Proposal Tool (APT) is a GUI-based software package used to write, validate, and submit proposals for the James Webb Space Telescope (and the Hubble Space Telescope).

The JWST Astronomer's Proposal Tool is under development and subject to updates. Current documentation is based on APT v25.0.3, and may be revised with future APT releases.

This page provides quick access to articles on many aspects of APT.  In turn, many of these articles link to more detailed descriptions or to instrument-specific information that will support proposers in understanding JWST and proposing for observation time.

APT has several key sections:

  • The Form Editor and Spreadsheet Editor provide two different interface types for viewing and entering proposal contents. 
  • The Visit Planner is used for checking the schedulability of proposed observations, 
  • Aladin is an interactive sky viewing tool that's integrated into APT. It's used to help observers visualize their observations, by projecting their exposure specifications on image data. 
  • The Submission button is for submitting completed proposals

There are additional features in APT, as shown in the tool's main menu, to help observers manage their science proposal efforts.