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HST Call for Proposals and HST Primer for Cycle 24 |
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8.15 Your proposal can include observations of fixed targets (i.e., all targets outside the solar system whose positions can be defined by specific celestial coordinates), generic targets (i.e., targets defined by certain general properties, rather than by specific coordinates), and solar-system targets (i.e., moving targets). Targets that have not yet been discovered or identified may generally be included only under special circumstances (see Section 4.1.5), and should be given generic target names.GO Proposals must include a list of all targets. Snapshot Proposals need only include a representative subset of targets in the Phase I submission (see Section 3.3.3). For proposals with a large number of fixed targets, there is a capability to ingest a comma-separated text file with the appropriate target information. See the APT Phase I Roadmap (“Fill in the Target Information”) for details.8.15.1 Target Number8.15.2 Target NameThe target naming conventions for HST are defined in detail in Section 3.2 of the HST Phase II Proposal Instructions. Please adhere to these naming conventions throughout your proposal. For generic targets use a short text description either of the target location (e.g., RANDOM-FIELD) or of the target itself (e.g., NEXT-SUPERNOVA).8.15.3 Provisional CoordinatesSupply the coordinates for fixed targets only. In Phase I, target positions with accuracies of ~1 arc minute are sufficient for the TAC and panel review (except in crowded fields where the identity of the target may be in question). However, in Phase II significantly more accurate coordinates will be required, and it is the responsibility of the proposers to provide these. See the STScI Phase II documentation for details.8.15.4 V-MagnitudeA magnitude or flux should be specified for every target. Supply the V-magnitude for the entire target (galaxy, planet, etc.), if known. In the case of observations with ACS/SBC, STIS/MAMA, or COS, specify the V-magnitude of the brightest object in the field of view (this may not be the primary target). For variable targets, give the brightest V-magnitude expected during the observations. The configurations mentioned above have detectors with bright-object safety limits, and observations that violate those limits are infeasible. See Section 5.1 of the HST Primer, or the respective Instrument Handbook (see Section 1.4.4) for details. With the exception of the safety checks, this information is used only for scientific review, not for exposure-time calculations. It is not required to specify the V-magnitude or flux for generic targets.8.15.5 Other FluxesFor each target you should specify either a V-magnitude or another magnitude or flux. Supply the apparent total magnitude or flux in the relevant passband for the entire target (galaxy, planet, etc.), if known. For variable targets, give the brightest magnitude expected during the observations. This information is used only for scientific review, not for exposure-time calculations. The format is free text.