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Hubble Space Telescope Call for Proposals for Cycle 22 > Chapter 3: Proposal Categories > 3.1 Overview of Proposal Categories

3.1 Overview of Proposal Categories
HST observations can be requested with a General Observer (GO; Section 3.2) or a Snapshot (SNAP; Section 3.3) Proposal. A GO Proposal can be Small (Section 3.2.1), Medium (Section 3.2.2), Large (Section 3.2.3), Calibration (Section 3.2.4), Long-Term (Section 3.2.5), or Treasury (Section 3.2.6). Funding for projects that do not require new HST observations can be requested with an Archival Research (AR; Section 3.4) Proposal. An AR Proposal can be either a Regular AR (Section 3.4.1), a Legacy AR (Section 3.4.2), or a Theory (Section 3.4.4) Proposal. Proposals can request observing time on Chandra (Section 3.5), Spitzer (Section 3.6), XMM-Newton (Section 3.7), NOAO telescopes (Section 3.8), and NRAO facilities (see Section 3.9) in conjunction with requests for HST observations. At any time scientists can request Director’s Discretionary (DD) time for unanticipated and scientifically compelling astronomical observations (Section 3.10).

Hubble Space Telescope Call for Proposals for Cycle 22 > Chapter 3: Proposal Categories > 3.1 Overview of Proposal Categories

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