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Space Telescope Science Institute |
Cycle 20 Phase II Proposal Instructions |
A target description must be selected for each target. The Target Description will be one of the key fields used by archival researchers in searching through the HST data archive; thus it is extremely important that the information be filled out completely and accurately for each target.Each target must be assigned a single primary category from Table 3.2, and at least one descriptive keyword, chosen from the appropriate Table 3.3 through Table 3.9 (see Table 3.2 for which table is appropriate for each category). The discrete features and descriptors in Table 3.10 may be used as descriptive keywords for any category. A maximum of five descriptive keywords may be selected.The categories in Table 3.2, and some of the descriptive keywords in Table 3.3 through Table 3.10, are followed by explanatory text in parentheses. This text is provided only for explanatory purposes and is not part of the category or keyword itself.If you are using the Text Proposal File, target description items must be separated by commas.
Table 3.2: Target Categories Descriptive Keywords SOLAR SYSTEM (Solar System Object) STAR (Galactic Stellar Object) EXT-STAR (Star in an External Galaxy) STELLAR CLUSTER (Galactic Star Cluster, Group, or Association) EXT-CLUSTER (Star Cluster in an External Galaxy) GALAXY (Galaxy or AGN) CLUSTER OF GALAXIES (Galaxy Groupings, Clusters, Large-scale Structure) ISM (Interstellar Medium of the Galaxy) EXT-MEDIUM (Interstellar Medium of an External Galaxy) UNIDENTIFIED (Unidentified Objects) CALIBRATION (Calibration Observations)
Table 3.3: Descriptive Keywords for STAR and EXT-STAR LMXB (Low Mass X-ray Binary) MXB (Massive X-ray Binary) Polar (AM Her Star) Intermediate Polar (DQ Her Star) Composite Spectral Type
Spiral (Spiral Galaxy) Quasar (Radio Loud) Lenticular (Lenticular Galaxy) Elliptical (Elliptical Galaxy; Not A Dwarf Elliptical) BL Lac (BL Lac or BLAZAR) Dwarf Compact (Dwarf Compact/HII Galaxy) BCM (Brightest Cluster Member) BGM (Brightest Group Member) LSB (Low Surface Brightness/HI Rich Galaxy) High Redshift Galaxy (z > 0.5) QSO (Radio Quiet)
BCM (Brightest Cluster Member) BGM (Brightest Group Member)
SNR (Supernova Remnant) Damped Lyman Alpha Cloud (Extragalactic) PDR (Photon Dominated Region)
Narrow Band Filter Calibration Raster & Step/Dwell Scan Verification
BLR (Broad Line Region) NLR (Narrow Line Region)