3.3 Target Category and Target Description
[Description]
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.
Text Proposal File
If you are using the Text Proposal File, target description items must be separated by commas.
Table 3.2: Target Categories
Category |
Descriptive Keywords |
Discrete Features and Descriptors |
SOLAR SYSTEM (Solar System Object) |
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STAR (Galactic Stellar Object) |
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EXT-STAR (Star in an External Galaxy) |
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STELLAR CLUSTER (Galactic Star Cluster, Group, or Association) |
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EXT-CLUSTER (Star Cluster in an External Galaxy) |
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GALAXY (Galaxy or AGN) |
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CLUSTER OF GALAXIES (Galaxy Groupings, Clusters, Large-scale Structure) |
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ISM (Interstellar Medium of the Galaxy) |
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EXT-MEDIUM (Interstellar Medium of an External Galaxy) |
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UNIDENTIFIED (Unidentified Objects) |
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CALIBRATION (Calibration Observations) |
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Table 3.3: Descriptive Keywords for STAR and EXT-STAR
Brown Dwarf |
AGB Star |
Herbig Ae/Be |
Wolf Rayet |
Post-AGB Star |
Horizontal Branch Star |
Wolf Rayet - WC |
Composite Spectral Type |
Interacting Binary |
Wolf Rayet - WN |
F0-F2 |
X-ray Novae |
Main Sequence O |
F3-F9 |
X-ray Burster |
Giant O |
FP |
X-ray Transient |
Supergiant O |
Late-type Degenerate |
LMXB (Low Mass X-ray Binary) |
OE |
G V-IV |
Gamma Ray Burster |
OF |
G III-I |
MXB (Massive X-ray Binary) |
SDO |
K V-IV |
RS CVn Star |
WDO |
K III-I |
W UMa Star |
B0-B2 V-IV |
M V-IV |
Beta Lyrae Star |
B3-B5 V-IV |
M III-I |
Algol System |
B6-B9.5 V-IV |
S Star |
Barium Star |
B0-B2 III-I |
Carbon Star |
Blue Straggler |
B3-B5 III-I |
Long Period Variable |
Neutron Star |
B6-B9.5 III-I |
Irregular Variable |
Pulsar |
BE |
Regular Variable |
Binary Pulsar |
BP |
Luminous Blue Variable |
FK Comae Star |
SDB |
Dwarf Nova |
Pulsating Variable |
DB |
Classical Nova |
PG1159 Star |
DA |
Nova-like |
ZZ Ceti Star |
DC |
Recurrent Nova |
Cepheid |
DZ |
Polar (AM Her Star) |
Supernova |
A0-A3 V-IV |
Intermediate Polar (DQ Her Star) |
Supernova Type Ia |
A4-A9 V-IV |
Symbiotic Star |
Supernova Type Ib |
A0-A3 III-I |
T Tauri Star |
Supernova Type II |
A4-A9 III-I |
FU Orionis Star |
RR Lyrae Star |
AE |
Shell Star |
Planetary Nebula Central Star |
AM |
Eta Carinae Star |
Emission Line Star |
AP |
YSO |
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Table 3.4: Descriptive Keywords for STELLAR CLUSTER and EXT-CLUSTER
Globular Cluster |
OB Association |
Open Cluster |
T Association |
Table 3.5: Descriptive Keywords for GALAXY
Spiral (Spiral Galaxy) |
Quasar (Radio Loud) |
Lenticular (Lenticular Galaxy) |
Radio Galaxy |
Elliptical (Elliptical Galaxy; Not A Dwarf Elliptical) |
BL Lac (BL Lac or BLAZAR) |
Dwarf Elliptical |
Liner |
Magellanic Irregular |
Starburst |
Amorphous Irregular |
Ultraluminous IR Gal |
Dwarf Compact (Dwarf Compact/HII Galaxy) |
Interacting Galaxy |
Dwarf Spheroidal |
Lyman Alpha Cloud |
BCM (Brightest Cluster Member) |
Protogalaxy |
BGM (Brightest Group Member) |
Gravitational Lens |
LSB (Low Surface Brightness/HI Rich Galaxy) |
Einstein Ring |
Seyfert |
High Redshift Galaxy (z > 0.5) |
QSO (Radio Quiet) |
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Table 3.6: Descriptive Keywords for CLUSTER OF GALAXIES
Supercluster |
Interacting Galaxy |
Void |
BCM (Brightest Cluster Member) |
Group |
BGM (Brightest Group Member) |
Rich Cluster |
Gravitational Lens |
Poor Cluster |
Einstein Ring |
High Redshift Cluster (z > 0.5) |
Blank Sky |
Galaxy Pair |
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Table 3.7: Descriptive Keywords for ISM and EXT-MEDIUM
Description |
Herbig-Haro Object |
Cometary Nebula |
Planetary Nebula |
Molecular Cloud |
HII Region |
Bipolar Outflow |
Reflection Nebula |
Absorption Line System |
Dark Cloud |
Absorption Line System - Galactic |
SNR (Supernova Remnant) |
Absorption Line System - Extragalactic |
Ring Nebula |
Damped Lyman Alpha Cloud (Extragalactic) |
HI Cloud |
Coronal Gas (105-106 K) |
High Velocity Cloud |
Hot Gas (107-108 K) |
Intermediate Velocity Cloud |
IGM |
IRAS Cirrus |
ICM |
Table 3.8: Descriptive Keywords for UNIDENTIFIED
Radio Emitter |
Ultraviolet Emitter |
Blank Field |
Low Latitude Field |
Infrared Emitter |
X-ray Emitter |
Parallel Field |
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Optical Emitter |
Gamma Ray Emitter |
High Latitude Field |
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Table 3.9: Descriptive Keywords for CALIBRATION
Astrometric |
Narrow Band Filter Calibration |
Target Acquisition Test |
Photometric |
FGS Stability |
Detector Sensitivity Test |
Wavelength |
Quantum Efficiency Test |
Focus Test |
Point Spread Function |
Pointing and Jitter Test |
Spacecraft Glow |
Occulting Finger Location |
Raster & Step/Dwell Scan Verification |
Occultation Mode Test |
Ion |
Spatial Distortion Test |
Throughput Test |
Taled |
Polarimetry |
Echelle Blaze Function |
Scattered Light Test |
Aperture Location |
Virtual Pointing |
Sky Background |
Detector Linearity Test |
FGS Transfer Function Test |
Instrument Sensitivity Test |
Carrousel Stability Test |
Shutter Control Test |
Table 3.10: Discrete Features and Descriptors for All Categories
Corona |
Disk |
BLR (Broad Line Region) |
Ring |
Bulge |
NLR (Narrow Line Region) |
Ansae |
Polar Ring |
Filament |
Protoplanetary Disk |
Dust Lane |
Ejecta |
Wind |
Spiral Arm |
Knot |
Accretion Disk |
Shell |
Star Forming Region |
Jet |
Tidal Tail |
Shock Front |
Lobe |
Bar |
Ionization Front |
Hotspot |
Multiple Nuclei |
Conduction Front |
Nucleus |
Cooling Flow |
Undesignated |
Halo |
Emission Line Nebula |
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