Proposing with STIS
The HST General Observer proposal process is divided into two Phases. First, Phase I proposals contain a scientific justification and abbreviated technical specifications for review by the Telescope Allocation Committee (TAC) in a particular Cycle. If the Phase I proposal is accepted by the TAC, the next step is the submit a Phase II proposal. Phase II proposals provide many more technical details for programs recommended by the TAC and approved by the STScI Director for implementation.
The information required by proposers in Phases I and II is provided in several extensive documents which are linked below. These discussions also provide links to key information from those documents, to facilitate rapid access to it by proposers.
Phase 1 Proposing Resources
Before creating a Phase I proposal, please check the duplication policy within the current cycle's Call for Proposals with the duplication checking tool, as duplicate observations will not be accepted.
STIS is a very versatile instrument and has a number of modes available to the user community. Because of this, we recommend taking a look at the available modes webpage, which consists of a summary of all of the available modes and some available-but-unsupported modes.
Please base orbit requests on exposure times implied by STIS sensitivity.