3.1.1 Target Descriptions

The Fixed Targets form is used to specify fixed targets in some HST observations. This article provides a list of target descriptions for the Astronomer's Proposal Tool (APT).

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Format definitions

Boldface type indicates the name of an APT parameter or a value for a parameter.

(red star) Black text indicates an important note.

Magenta text indicates available but unsupported parameters (requires prior approval from STScI).

Red text indicates restricted parameters (for STScI use only).

Brown text indicates text file parameters.

Items in brackets - <value> - are required values.

Items in square brackets - [<value>] - are optional.

Target Descriptions for the Astronomer's Proposal Tool (APT)

Table 3.5: Descriptive Keywords for Solar System

Descriptive Keywords for Solar System
PlanetFeature
Dwarf-PlanetOffset
SatelliteRing
CometTorus
AsteroidOther


Table 3.6: Descriptive Keywords for STAR and EXT-STAR

Descriptive Keywords for STAR and EXT-STAR

Brown Dwarf

F0-F2

Herbig Ae/Be

Wolf Rayet

F3-F9

Horizontal Branch Star

Wolf Rayet – WC

FP

Interacting Binary

Wolf Rayet – WN

Late-type Degenerate

X-ray Novae

Main Sequence O

G V-IV

X-ray Burster

Giant O

G III-I

X-ray Transient

Supergiant O

K V-IV

LMXB (Low Mass X-ray Binary)

OE

K III-I

Gamma Ray Burster

OF

M V-IV

MXB (Massive X-ray Binary)

SDO

M III-I

RS CVn Star

WDO

L

W UMa Star

B0-B2 V-IV

T

Beta Lyrae Star

B3-B5 V-IV

S Star

Algol System

B6-B9.5 V-IV

Carbon Star

Barium Star

B0-B2 III-I

Long Period Variable

Blue Straggler

B3-B5 III-I

Irregular Variable

Neutron Star

B6-B9.5 III-I

Regular Variable

Pulsar

BE

Luminous Blue Variable

Binary Pulsar

BP

Dwarf Nova

FK Comae Star

SDB

Classical Nova

Pulsating Variable

DB

Nova-like

PG1159 Star

DA

Recurrent Nova

ZZ Ceti Star

DC

Polar (AM Her Star)

Cepheid

DZ

Intermediate Polar (DQ Her Star)

Supernova

A0-A3 V-IV

Symbiotic Star

Supernova Type Ia

A4-A9 V-IV

T Tauri Star

Supernova Type Ib

A0-A3 III-I

FU Orionis Star

Supernova Type II

A4-A9 III-I

Shell Star

RR Lyrae Star

AE

Eta Carinae Star

Planetary Nebula Central Star

AM

YSO

Emission Line Star

AP

Extra-solar Planet

Circumstellar Matter

AGB Star

Extra-solar Planetary System

Population II

Post-AGB Star

Pre-main sequence Star


Composite Spectral Type

Low Mass Companion



Table 3.7: Descriptive Keywords for STELLAR CLUSTER and EXT-CLUSTER

Descriptive Keywords for STELLAR CLUSTER and EXT-CLUSTER
Globular Cluster

OB Association

Open Cluster

T Association

Young Association



Table 3.8: Descriptive Keywords for GALAXY

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 EllipticalLiner
Magellanic IrregularStarburst
Amorphous IrregularUltraluminous IR Gal
Dwarf Compact (Dwarf Compact/HII Galaxy)Interacting Galaxy
Dwarf SpheroidalLyman Alpha Cloud
BCM (Brightest Cluster Member)Protogalaxy
BGM (Brightest Group Member)Einstein Ring
LSB (Low Surface Brightness/HI Rich Galaxy)

High Redshift Galaxy (z > 0.5)

Seyfert

QSO (Radio Quiet)



Table 3.9: Descriptive Keywords for CLUSTER OF GALAXIES

Descriptive Keywords for CLUSTER OF GALAXIES
Supercluster

Interacting Galaxy

VoidBCM (Brightest Cluster Member)
GroupBGM (Brightest Group Member)

Rich Cluster

Einstein Ring
Poor ClusterBlank Sky
High Redshift Cluster (z > 0.5)
Galaxy Pair


Table 3.10: Descriptive Keywords for ISM and EXT-MEDIUM

Descriptive Keywords for ISM and EXT-MEDIUM
Herbig-Haro ObjectCometary Nebula
Planetary NebulaMolecular Cloud
HII RegionBipolar Outflow
Reflection NebulaAbsorption Line System
Dark CloudAbsorption Line System – Galactic 
SNR (Supernova Remnant)Absorption Line System – Extragalactic
Ring NebulaDamped Lyman Alpha Cloud (Extragalactic)
HI Cloud

Coronal Gas (105–106 K)

High Velocity CloudHot Gas (107–108 K)
Intermediate Velocity CloudIGM
IRAS CirrusICM

PDR (Photon Dominated Region)



Table 3.11: Descriptive Keywords for UNIDENTIFIED

Descriptive Keywords for UNIDENTIFIED
Radio EmitterUltraviolet EmitterBlank FieldLow Latitude Field
Infrared EmitterX-ray EmitterParallel Field
Optical EmitterGamma Ray EmitterHigh Latitude Field


Table 3.12: Descriptive Keywords for CALIBRATION

Descriptive Keywords for CALIBRATION
AstrometricNarrow Band Filter CalibrationTarget Acquisition Test
PhotometricFGS Stability

Detector Sensitivity Test

WavelengthQuantum Efficiency TestFocus Test
Point Spread FunctionPointing and Jitter TestSpacecraft Glow
Occulting Finger Location

Raster & Step/Dwell Scan Verification

Occultation Mode Test

IonSpatial Distortion TestThroughput Test
TaledPolarimetryEchelle Blaze Function
Scattered Light TestAperture LocationVirtual Pointing
Sky BackgroundDetector Linearity TestFGS Transfer Function Test
Instrument Sensitivity TestCarrousel Stability TestShutter Control Test


Table 3.13: Discrete Features and Descriptors for All Categories

Discrete Features and Descriptors for All Categories
CoronaDiskBLR (Broad Line Region)
RingBulgeNLR (Narrow Line Region)
AnsaePolar RingFilament
Protoplanetary DiskDust LaneEjecta
WindSpiral ArmKnot
Accretion DiskShellStar Forming Region
JetTidal TailShock Front
LobeBarIonization Front
HotspotMultiple NucleiConduction Front
NucleusCooling FlowUndesignated
HaloEmission Line NebulaGravitational Lens



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