TABLE  Detection

Contains individual detections for every plate and stack in the field F287.

Each scanned plate or stack in the F287 results in a pixel map. This map
was processed using standard software (known as Image Analysis Mode,
or IAM, software) to produce a list of parameterised detections in each
image. This table contains all the attributes for each detected object.
The attribute set consists of the standard 32 IAM parameters plus
calibrated photometry and spatial index quantities.

Required constraints:
  • Primary key is (objID)

NameTypeLengthUnitDescriptionDefault ValueUnified Content Descriptor
objIDbigint8 Unique object identification number (combination of plateNum and recNum)-99999999ID_MAIN
plateNumint4 Plate ID of the plate that this detection came from-99999999ID_PLATE
filterIDsmallint2 Unique filter identification number-9999INST_FILTER_CODE
parentIDbigint8 objID of parent object, = objID for parent/undeblended (ie. not child) object-99999999ID_PARENT
recNumint4 The record number in the original IAM file-99999999RECORD
rafloat8degreesCelestial Right Ascension-0.99999995e9POS_EQ_RA_MAIN
decfloat8degreesCelestial Declination-0.99999995e9POS_EQ_DEC_MAIN
htmIdbigint8 Hierarchical Triangular Mesh (20-deep) of centroid-99999999POS_GENERAL
cxfloat8 Cartesian x of unit (ra,dec) vector on celestial sphere-0.99999995e9POS_EQ_X
cyfloat8 Cartesian y of unit (ra,dec) vector on celestial sphere-0.99999995e9POS_EQ_Y
czfloat8 Cartesian z of unit (ra,dec) vector on celestial sphere-0.99999995e9POS_EQ_Z
xminfloat8micronsLeftmost extent of image on plate-0.99999995e9POS_PLATE_X
xmaxfloat8micronsRightmost extent of image on plate-0.99999995e9POS_PLATE_X
yminfloat8micronsBottommost extent of image on plate-0.99999995e9POS_PLATE_Y
ymaxfloat8micronsTopmost extent of image on plate-0.99999995e9POS_PLATE_Y
areaint4pixelsArea within detection isophote-99999999EXTENSION_AREA
ipeakreal4instrumental unitsIntensity of brightest pixel above sky-0.99999995e9PHOT_INTENSITY_MISC
cosmagreal4instrumental unitsIsophotal magnitude-0.99999995e9PHOT_PHG_MAG
iskyreal4 Estimate of sky intensity at (xCen, yCen)-0.99999995e9PHOT_SB_SKY
xCenfloat8micronsIntensity-weighted X-centroid of image-0.99999995e9POS_PLATE_X
yCenfloat8micronsIntensity-weighted Y-centroid of image-0.99999995e9POS_PLATE_Y
aUreal4micronsSemi-major axis of unweighted fitted ellipse-0.99999995e9EXTENSION_RAD
bUreal4micronsSemi-minor axis of unweighted fitted ellipse-0.99999995e9EXTENSION_SMIN
thetaUsmallint2degreesPosition angle (wrt x-axis) of unweighted fitted ellipse-9999POS_POS-ANG
aIreal4micronsSemi-major axis of intensity-weighted fitted ellip.-0.99999995e9EXTENSION_RAD
bIreal4micronsSemi-minor axis of intensity-weighted fitted ellip.-0.99999995e9EXTENSION_SMIN
thetaIsmallint2degreesPosition angle (wrt x-axis) of intensity-weighted fitted ellipse-9999POS_POS-ANG
classtinyint1 Classification flag0CLASS_OBJECT
pasmallint2degreesCelestial position angle (E of N)-9999POS_POS-ANG
ap1int4pixelsArea above 1st areal profile threshold-99999999EXTENSION_AREA
ap2int4pixelsArea above 2nd areal profile threshold-99999999EXTENSION_AREA
ap3int4pixelsArea above 3rd areal profile threshold-99999999EXTENSION_AREA
ap4int4pixelsArea above 4th areal profile threshold-99999999EXTENSION_AREA
ap5int4pixelsArea above 5th areal profile threshold-99999999EXTENSION_AREA
ap6int4pixelsArea above 6th areal profile threshold-99999999EXTENSION_AREA
ap7int4pixelsArea above 7th areal profile threshold-99999999EXTENSION_AREA
ap8int4pixelsArea above 8th areal profile threshold-99999999EXTENSION_AREA
blendint4 Deblend flag: -n=parent of n children; +n = nth child of a parent-99999999CODE_MULT_INDEX
qualityint4 Bitwise quality flag-99999999CODE_QUALITY
prfStatreal4N(0,1)Profile statistic-0.99999995e9CLASS_STAR/GALAXY
prfMagreal4instrumental unitsProfile magnitude-0.99999995e9PHOT_PHG_MAG
gMagreal4magMagnitude calculated on assumption object is galaxy-0.99999995e9MODEL_MAG_VALUE
sMagreal4magMagnitude calculated on assumption object is star-0.99999995e9MODEL_MAG_VALUE
gCorMagreal4magColour-corrected magnitude calculated on assumption object is galaxy-0.99999995e9MODEL_MAG_VALUE
sCorMagreal4magColour-corrected magnitude calculated on assumption object is star-0.99999995e9MODEL_MAG_VALUE
Total length225