Are there any restrictions on Fill-in Target observations?
Yes. Fill-in Targets: • cannot be ToO observations • must have no observational constraints • can only be observed once (no multiple observations of the same target) • are limited to no more than 50 targets per proposer (i.e., among all fill-in target proposals for that proposer) • will be scheduled as needed, after GRB follow-up, ToO, and regular non-ToO observations (ie., they are lower priority than all of these) • will be added to the observing program at the discretion of the science operations team, to maximize the Swift science program • are not guaranteed to be observed; PIs should have no expectation that their entire list of accepted fill-in targets will be observed Funding will be contingent upon at least one target being observed for no less than 80% of the requested time. Please note that the budget ceiling for Fill-in proposals has been lowered to $20k in Cycle 6.
