Guest Investigator Program

The Swift GI Program solicits proposals for basic research that is relevant to the Swift GRB mission. Cycle 9 of the Swift GI Program began in April 2013 and will last for 12 months. Cycle 10 will begin in April 2014 and last for 12 months.

The Swift GI Program is open to all principal investigators, but funding is only available to scientists at U.S. institutions for proposals with a principal investigator at a U.S. institution. U.S.-based co-investigators on non-U.S. led proposals do not qualify for funding.

The GI Program is intended to provide the following benefits to participating scientists.

• Provide funding for theoretical investigations that will advance Swift mission science return. Theory proposals are not restricted to GRB investigations and will be considered provided that they address the degree to which the investigations directly advance Swift science goals.

• Provide funding for correlative GRB observations that involve new or enhanced ground-based infrared capabilities for investigating high redshift bursts. Proposals to bring new or enhanced ground-based IR capabilities online may require funding substantially above the average award. Such budget requests will be considered provided they are strongly justified.

• Provide funding for other correlative observations that will support Swift observations. This category includes correlative GRB observations, as in previous cycles, and in Cycle 10 it has been expanded to non-GRB observations.

• Provide funding for new Swift GRB projects.

• Allow observations of non-target-of-opportunity observations of non-GRB targets, target of opportunity observations of non-GRB sources, target of opportunity observations of GRB sources detected by other instruments, and fill-in targets.

It is anticipated that a total of five million seconds of observing time will be made available to the GI component of the Cycle 10 GI program. Swift observations will be performed only as the result of an uploaded ground command through the normal science planning process. Proposers may not request autonomous slewing. GI observations will have a lower scheduling priority than GRBs or ToOs and will be observed on a best-effort basis as time becomes available in the observing schedule. This restriction means that successful proposers should be aware that they are not assured 100% of the time awarded will actually be available. Every effort will be made to observe 80% or more of an accepted program within scheduling constraints. A single observation is defined as one requested pointing at a target, but proposers should be aware that, due to Swift's low orbit and scheduling priorities, any GI observation longer than approximately 20-30 min is likely to be split into multiple snapshots on different orbits.

Non-target-of-opportunity proposals are subject to the following limitations.

• Requested time per observation will be limited to between 1000 s (minimum) and 40000 s (maximum).

• Monitoring programs are defined as programs requiring two or more observations of the same object, each of which is considered to be a ``visit''.

• No more than 2000 visits will be permitted in Cycle 10. This is the total for all proposal categories, including both monitoring and non-monitoring observation requests.

Time constrained observations are subject to the following limitations.

• The length of the observing window must exceed three (3) hours.

• The maximum number of time-constrained observations for Cycle 10 is 500.

ToO proposals are subject to the following constraints.

• Proposals must give exact, detailed trigger criteria and a realistic estimate of the probability of triggering during Cycle 10.

• Proposals must assign a priority to each ToO target based on the time criticality of the observation. For the time of the trigger the priorities are described as:
  • Highest Urgency: Observations should be performed within four (4) hours
  • High Urgency: Observations should be performed within 24 hours.
  • Medium Urgency: Observations can be performed within 1-7 days.
  • Low Urgency: Observations can be performed within weeks.

• There are no restrictions on the maximum number of highest- and high-urgency ToOs that will be performed during Cycle 10.

Large proposals are defined as proposals that have more than 100 targets or more than 100 ks total exposure time. Due to Swift's low Earth orbit, and scheduling priorities for other objects, any long observation exceeding a few ks will be broken up into several different visits on different orbits.

Fill-in targets are intended to provide a list of peer-reviewed targets that can be used to fill in gaps in Swift's planned science observations timeline. Fill-in targets must not be ToOs, must have no observational constraints, and can not require multiple observations. The total requested integration time must be between 1000 s and 40000 s. There is no guarantee that any fill-in target will be observed, or reobserved of observations are interrupted. There is no funding available for fill-in observations.

Successful proposers do not get any proprietary rights to any Swift data. Table 1 lists the critical dates for Cycle 10 GI proposals. For more information please see the Swift Guest Investigator Program Web pages.

Table 1: Critical dates for the Swift Cycle 10 GI Program.

Date	Action
Sep 26, 2013	Phase 1 Proposals Due at 4.30pm EDT
Dec 2013	Proposal Review
Feb 2014	Phase 2 Budget Proposals Due
Apr 1, 2014	Cycle 10 Investigations Begin
Mar 31, 2015	Cycle 10 Investigations End