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AST Attribute Descriptions
Subsections
Abbrev(axis)Abbrevaxis - Abbreviate leading fields within numerical axis labels?
AdaptiveAdaptive - Should the area adapt to changes in the coordinate system?
AlignOffsetAlignOffset - Align SkyFrames using the offset coordinate system?
AlignSideBandAlignSideBand - Should the SideBand attribute be taken into account when aligning this DSBSpecFrameDSBSpecFrame with another DSBSpecFrame?
AlignSpecOffsetAlignSpecOffset - Align SpecFrames using the offset coordinate system?
AlignStdOfRestAlignStdOfRest - Standard of rest to use when aligning SpecFrames
AlignSystemAlignSystem - Coordinate system in which to align the Frame
AlignTimeScaleAlignTimeScale - Time scale to use when aligning TimeFrames
AllVariantsAllVariants - A list of the variant Mappings associated with the current Frame
AllWarningsAllWarnings - A list of all currently available condition names
AsTime(axis)AsTimeaxis - Format celestal coordinates as times?
BaseBase - FrameSet base Frame index
BorderBorder - Draw a border around valid regions of a Plot?
Bottom(axis)Bottomaxis - Lowest axis value to display
BoundedBounded - Is the Region bounded?
CDMatrixCDMatrix - Use CDi_j keywords to represent pixel scaling, rotation, etc?
CarLinCarLin - Ignore spherical rotations on CAR projections?
CardCard - Index of current FITS card in a FitsChan
CardCommCardComm - The comment for the current card in a FitsChan
CardNameCardName - The keyword name of the current card in a FitsChan
CardTypeCardType - The data type of the current card in a FitsChan
ClassClass - Object class name
CleanClean - Remove cards used whilst reading even if an error occurs?
ClipClip - Clip lines and/or markers at the Plot boundary?
ClipOpClipOp - Combine Plot clipping limits using a boolean OR?
ClosedClosed - Should the boundary be considered to be inside the region?
Colour(element)Colourelement - Colour index for a Plot element
ColumnLenC(column)ColumnLenCcolumn - The largest string length of any value in a column
ColumnLength(column)ColumnLengthcolumn - The number of elements in each value in a column
ColumnNdim(column)ColumnNdimcolumn - The number of axes spanned by each value in a column
ColumnType(column)ColumnTypecolumn - The data type of each value in a column
CommentComment - Include textual comments in output?
CurrentCurrent - FrameSet current Frame index
DSBCentreDSBCentre - The central position of interest in a dual sideband spectrum
DefB1950DefB1950 - Use FK4 B1950 as defaults?
Digits/Digits(axis)DigitsDigitsaxis - Number of digits of precision
Direction(axis)Directionaxis - Display axis in conventional direction?
DiscoDisco - PcdMap pincushion/barrel distortion coefficient
DomainDomain - Coordinate system domain
DrawAxes(axis)DrawAxesaxis - Draw axes for a Plot?
DrawTitleDrawTitle - Draw a title for a Plot?
Dut1Dut1 - The UT1-UTC correction
Edge(axis)Edgeaxis - Which edges to label in a Plot
EncodingEncoding - System for encoding Objects as FITS headers
EpochEpoch - Epoch of observation
EquinoxEquinox - Epoch of the mean equinox
EscapeEscape - Allow changes of character attributes within strings?
FillFactorFillFactor - Fraction of the Region which is of interest
FitsDigitsFitsDigits - Digits of precision for floating point FITS values
Font(element)Fontelement - Character font for a Plot element
Format(axis)Formataxis - Format specification for axis values
FullFull - Set level of output detail
Gap(axis)Gapaxis - Interval between linearly spaced major axis values of a Plot
GrfGrf - Use Grf functions registered through astGrfSet?
GridGrid - Draw grid lines for a Plot?
GrismAlphaGrismAlpha - The angle of incidence of the incoming light on the grating surface
GrismEpsGrismEps - The angle between the normal and the dispersion plane
GrismGGrismG - The grating ruling density
GrismMGrismM - The interference order
GrismNRGrismNR - The refractive index at the reference wavelength
GrismNRPGrismNRP - The rate of change of refractive index with wavelength
GrismThetaGrismTheta - Angle between normal to detector plane and reference ray
GrismWaveRGrismWaveR - The reference wavelength
IDID - Object identification string
IFIF - The intermediate frequency in a dual sideband spectrum
IdentIdent - Permanent Object identification string
ImagFreqImagFreq - The image sideband equivalent of the rest frequency
IndentIndent - Specifies the indentation to use in text produced by a Channel
IntraFlagIntraFlag - IntraMap identification string
InvertInvert - Mapping inversion flag
InvisibleInvisible - Draw graphics using invisible ink?
IsLatAxis(axis)IsLatAxisaxis - Is the specified celestial axis a latitude axis?
IsLinearIsLinear - Is the Mapping linear?
IsLonAxis(axis)IsLonAxisaxis - Is the specified celestial axis a longitude axis?
IsSimpleIsSimple - Has the Mapping been simplified?
IterInverseIterInverse - Provide an iterative inverse transformation?
IwcIwc - Include a Frame representing FITS-WCS intermediate world coordinates?
KeyCaseKeyCase - Are keys case sensitive?
KeyErrorKeyError - Report an error when getting the value of a non-existant KeyMap entry?
LTOffsetLTOffset - The offset from UTC to Local Time, in hours
Label(axis)Labelaxis - Axis label
LabelAt(axis)LabelAtaxis - Where to place numerical labels for a Plot
LabelUnits(axis)LabelUnitsaxis - Use axis unit descriptions in a Plot?
LabelUp(axis)LabelUpaxis - Draw numerical Plot labels upright?
LabellingLabelling - Label and tick placement option for a Plot
LatAxisLatAxis - Index of the latitude axis
ListSizeListSize - Number of points in a PointList
LogGap(axis)LogGapaxis - Interval between major axis values of a Plot
LogLabel(axis)LogLabelaxis - Use exponential format for numerical axis labels?
LogPlot(axis)LogPlotaxis - Map the plot logarithmically onto the screen?
LogTicks(axis)LogTicksaxis - Space the major tick marks logarithmically?
LonAxisLonAxis - Index of the longitude axis
LutInterpLutInterp - Look-up table interpolation method
MajTickLen(axis)MajTickLenaxis - Length of major tick marks for a Plot
MapLockedMapLocked - Prevent new entries being added to a KeyMap?
MatchEndMatchEnd - Match trailing axes?
MaxAxesMaxAxes - Maximum number of Frame axes to match
MeshSizeMeshSize - Number of points used to represent the boundary of a Region
MinAxesMinAxes - Minimum number of Frame axes to match
MinTick(axis)MinTickaxis - Density of minor tick marks for a Plot
MinTickLen(axis)MinTickLenaxis - Length of minor tick marks for a Plot
NatLatNatLat - Native latitude of the reference point of a FITS-WCS projection
NatLonNatLon - Native longitude of the reference point of a FITS-WCS projection
NaxesNaxes - Number of Frame axes
NcardNcard - Number of FITS header cards in a FitsChan
NcolumnNcolumn - The number of columns in the table
NegLonNegLon - Display negative longitude values?
NegatedNegated - Region negation flag
NframeNframe - Number of Frames in a FrameSet
NinNin - Number of input coordinates for a Mapping
NiterInverseNiterInverse - Maximum number of iterations for the iterative inverse transformation
NkeyNkey - Number of unique FITS keywords in a FitsChan
NobjectNobject - Number of Objects in class
Norm(axis)Normaxis - Specifies the plane upon which a Plot3D draws text and markers
NormUnit(axis)NormUnitaxis - Normalised Axis physical units
NoutNout - Number of output coordinates for a Mapping
NparameterNparameter - The number of global parameters in the table
NrowNrow - The number of rows in the table
NumLab(axis)NumLabaxis - Draw numerical axis labels for a Plot?
NumLabGap(axis)NumLabGapaxis - Spacing of numerical labels for a Plot
ObjSizeObjSize - The in-memory size of the Object
ObsAltObsAlt - The geodetic altitude of the observer
ObsLatObsLat - The geodetic latitude of the observer
ObsLonObsLon - The geodetic longitude of the observer
PVMax(i)PVMaxi - Maximum number of FITS-WCS projection parameters
PVi_mPVi_m - FITS-WCS projection parameters
PcdCen(axis)PcdCenaxis - Centre coordinates of pincushion/barrel distortion
PermutePermute - Permute axis order?
PolarLongPolarLong - The longitude value to assign to either pole
PolyTanPolyTan - Use PVi_m keywords to define distorted TAN projection?
PreserveAxesPreserveAxes - Preserve axes?
ProjP(m)ProjPm - FITS-WCS projection parameters
ProjectionProjection - Sky projection description
RefCountRefCount - Count of active Object pointers
RefDecRefDec - The declination of the reference point
RefRARefRA - The right ascension of the reference point
RegionClassRegionClass - The AST class name of the Region encapsulated within an Stc
ReportReport - Report transformed coordinates?
ReportLevelReportLevel - Determines which read/write conditions are reported
RestFreqRestFreq - The rest frequency
RootCornerRootCorner - Specifies which edges of the 3D box should be annotated
SeedSeed - Random number seed for a MathMap
SideBandSideBand - Indicates which sideband a dual sideband spectrum represents
SimpFISimpFI - Forward-inverse MathMap pairs simplify?
SimpIFSimpIF - Inverse-forward MathMap pairs simplify?
SinkFileSinkFile - Output file to which to data should be written
Size(element)Sizeelement - Character size for a Plot element
SizeGuessSizeGuess - The expected size of the KeyMap
SkipSkip - Skip irrelevant data?
SkyRef(axis)SkyRefaxis - Position defining the offset coordinate system
SkyRefIsSkyRefIs - Selects the nature of the offset coordinate system
SkyRefP(axis)SkyRefPaxis - Position on primary meridian of offset coordinate system
SortBySortBy - Determines how keys are sorted in a KeyMap
SourceFileSourceFile - Input file from which to read data
SourceSysSourceSys - Spectral system in which the source velocity is stored
SourceVRFSourceVRF - Rest frame in which the source velocity is stored
SourceVelSourceVel - The source velocity
SpecOriginSpecOrigin - The zero point for SpecFrame axis values
SpecValSpecVal - The spectral position at which flux values are measured
StcsAreaStcsArea - Return the CoordinateArea component when reading an STC-S document?
StcsCoordsStcsCoords - Return the Coordinates component when reading an STC-S document?
StcsLengthStcsLength - Controls output line length
StcsPropsStcsProps - Return all properties when reading an STC-S document?
StdOfRestStdOfRest - Standard of rest
StrictStrict - Report an error if any unexpeted data items are found?
Style(element)Styleelement - Line style for a Plot element
Symbol(axis)Symbolaxis - Axis symbol
SystemSystem - Coordinate system used to describe positions within the domain
TabOKTabOK - Should the FITS-WCS -TAB algorithm be recognised?
TextLab(axis)TextLabaxis - Draw descriptive axis labels for a Plot?
TextLabGap(axis)TextLabGapaxis - Spacing of descriptive axis labels for a Plot
TickAllTickAll - Draw tick marks on all edges of a Plot?
TimeOriginTimeOrigin - The zero point for TimeFrame axis values
TimeScaleTimeScale - Time scale
TitleTitle - Frame title
TitleGapTitleGap - Vertical spacing for a Plot title
TolTol - Plotting tolerance
TolInverseTolInverse - Target relative error for the iterative inverse transformation
Top(axis)Topaxis - Highest axis value to display
TranForwardTranForward - Forward transformation defined?
TranInverseTranInverse - Inverse transformation defined?
Unit(axis)Unitaxis - Axis physical units
UnitRadiusUnitRadius - SphMap input vectors lie on a unit sphere?
UseDefsUseDefs - Use default values for unspecified attributes?
VariantVariant - Indicates which variant of the current Frame is to be used
WarningsWarnings - Controls the issuing of warnings about various conditions
WcsAxis(lonlat)WcsAxislonlat - FITS-WCS projection axes
WcsTypeWcsType - FITS-WCS projection type
Width(element)Widthelement - Line width for a Plot element
XmlFormatXmlFormat - System for formatting Objects as XML
XmlLengthXmlLength - Controls output buffer length
XmlPrefixXmlPrefix - The namespace prefix to use when writing
ZoomZoom - ZoomMap scale factor