What is APT?

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

Download and Installation Instructions

Current Release: 27.1.1

Released: June 3, 2019

No changes for HST Proposers

Change for JWST Proposers. See release notes.

Previous Release Information

Documentation, Training, and Support

Documentation, Training, and Support

Links to user documentation, training materials, and APT support are provided in the sections below based on the type of proposal being submitted.