HST Proposal Checklist

HST Cycle 30 proposers are encouraged to follow this checklist for writing and submitting proposals for the Hubble Space Telescope (HST).

(tick) Know the deadlines

The Cycle 30 Phase I proposal deadline is March 25, 2022 at 8:00pm EDT.

The first Cycle 30 Mid-cycle Phase I proposal deadline is September 30, 2022.

The second Cycle 30 Mid-cycle Phase I proposal deadline is January 31, 2023.

Director's Discretionary Time proposals can be submitted at any time.

HST Phase I Proposal Roadmap

(tick) Know where to find the HST User Documentation

(tick) Learn the HST observation planning tools

(tick) Design a HST observing program in APT

(tick) Write your science proposal

Create the PDF attachment of the proposal narrative, which includes a number of required text sections such as the Scientific Justification and Technical Justification.

(tick) Submit your HST proposal

  • Attach the PDF of your scientific proposal to the APT program on Proposal Information form.
  • Preview the entire proposal by selecting the APT PDF Preview tool. This view will merge the information provided in APT along with the PDF attachment, and is what the Telescope Allocation Committee (TAC) will review. 
  • Submit your completed proposal with APT. Select the APT Submission Tool in the top tool bar and follow the instructions.  In the Submission Log window you will see a message giving the time of the submission, the assigned proposal ID (if a new proposal), and the submission status.
  • After the initial submission, proposals can be re-submitted as needed (up to the stated deadline). Resubmitting does not change the proposal number received upon the initial submission.

(tick) Wait and Check

After you submit your proposal, all investigators will receive an automatic email acknowledgment that the submission was received successfully. If you do not receive that email within minutes of your submission, please check the APT Submission Log Window for a problem. In addition, all investigators will receive an additional email indicating whether your proposal was successfully processed after the submission deadline. If you do not receive this acknowledgement within 72 hours of the deadline, please submit an incident to the HST Help Desk, http://hsthelp.stsci.edu/, as your submission was NOT RECEIVED and the TAC WILL NOT see your proposal; please provide the submission ID information from the APT Submission Log window. If there are any problems associated with your PDF attachment or APT information submitted, you will be contacted by email separately.

Notification of your proposal's status (approved or rejected) generally occurs within ~3 weeks of the Telescope Allocation Committee meeting. 

(tick) Next steps for approved programs

Selected Phase I programs are contingent on the approval of the Phase II proposal. The HST Phase II Proposal Roadmap provides an overview and further details of the Phase II process.

U.S. investigators with approved HST programs are eligible for funding. See HST Grant Funding and Budget Submissions for further details. Successful HST observing proposals will be reviewed by a STScI instrument scientist and program coordinator. Programs may require adjustments or revisions after the award. The Instrument Scientist and Program Coordinator will iterate with proposers to finalize the observations in accordance with the TAC recommendations, under the approval of the STScI Director.



Next: HST Anonymous Proposal Reviews