Space Telescope Science Institute
Cycle 20 Phase II Proposal Instructions
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HST Phase II Proposal Instructions for Cycle 20 > Chapter 3: Fixed and Generic Targets

Chapter 3: Fixed and Generic Targets
Tables and Figures
Table 3.1: Designations of Special Targets
Table 3.2: Target Categories
Table 3.3: Descriptive Keywords for STAR and EXT-STAR
Table 3.4: Descriptive Keywords for STELLAR CLUSTER and EXT-CLUSTER
Table 3.5: Descriptive Keywords for GALAXY
Table 3.6: Descriptive Keywords for CLUSTER OF GALAXIES
Table 3.7: Descriptive Keywords for ISM and EXT-MEDIUM
Table 3.8: Descriptive Keywords for UNIDENTIFIED
Table 3.9: Descriptive Keywords for CALIBRATION
Table 3.10: Discrete Features and Descriptors for All Categories
Table 3.11: Required Coordinate Accuracies
Table 3.12: Formats for Specification of Target Flux Data
Table 3.13: Bright-Object Constraints
The use of “FIXED_TARGETS” and “GENERIC_TARGETS” are described in this chapter. To make the presentation of this material more concise, the section on solar system targets has been made into a separate chapter; see Chapter 4: Solar System Targets on page 59.
The Target List tells us where you wish to point HST and so must be filled out with care, precision, and accuracy. The Target List also provides the information that defines and describe the targets, and which was used to determine exposure times. Three different kinds of Target Lists exist for the following three classes of targets, but only the Target List(s) required for your proposal need be submitted:
In this chapter, each heading has a description followed by a keyword in square brackets (e.g., [Number]). Elsewhere, items in boldface (e.g., RA) show words or phrases that are used as APT Phase II keywords or properties. Items in <> brackets (e.g., <value>) show values you provide. Values of items listed in square brackets (e.g., [A1: <value>]) are optional, whereas those not in square brackets are required. As you enter information in the APT interface, you will be told (via a tooltips message) if an item is required.

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