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Proposal Kit

Director's Discretionary Time (DDT)

Spitzer is accepting DDT proposals: Read Me First!


Proposal DeadlineEstimated Earliest Possible Execution Date
February 8, 2019 - noon PST mid-April 2019
May 10, 2019 - noon PDT mid-July 2019
September 10, 2019 - noon PDT  mid-November 2019


    To submit a Spitzer DDT proposal fill out this online submission form, which includes:

    • Standard coversheet information (PI and Co-I contact information, proposal title, etc, as for a regular General Observer submission).
    • Complete Astronomical Observation Requests (AORs).
    • A strong scientific justification (must be in PDF format), specifying why the request was not submitted during the normal Call for Proposals and the long-term legacy value of the observation. Please use the templates:

    Please upload both the science justification and the AORs via the online form.

    Note that requests for DDT cannot be used to resubmit all or part of a proposal that was rejected by the normal peer review process.

    Guidelines for Submission of Director's Discretionary Time Proposals

Proposals Due:    Friday, 23 March 2018, 2 PM PDT

The Cycle 14 Call for Proposals is now closed.

Cycle 14 proposal templates
AOR file parser - perl script for preparing observation summary table from your AORs.
Older Calls for Proposals
Proposal and Program Statistics
Note for Solar System Observers
15 February 2018: Spitzer science operations have been extended through November 2019. The Cycle-14 Call for Proposals is updated as follows:
 * Proposal due date: extended one week to March 23, 2018
 * Cycle-14 is now 13 months long: 1 November 2018 - 30 November 2019
 * Observing time available increased to 6,000 hours: priority 1 = 4000 hours, priority 2 = 2,000 hours
 * There is no longer a 500-hour practical limit to the proposal size as multiple visibility windows should be possible for all targets. Any size proposal may be submitted.

A longer cookbook-style document on how to go from an idea to a set of fully-functional Astronomical Observation Requests (AORs) for your Spitzer proposal.
Spot is a software package used by Spitzer observers to plan observations, and Leopard is a software package used to query the archive. Together, this group of cats is referred to as the "Spitzer Pride."