| Sub-selection of reliable, BUT INCOMPLETE, stellar objects from Source. |
| This view of table Source defines a reliable, but incomplete, selection of point sources. The select statement of the view requires the source to be present on at least three out of four plates (Nplates > 2) along with a "good" astrometric fit (ie. chi-squared value < 3.0) and on each plate the following conditions are placed on available morphological parameters: ellipticity < 0.25 (ie. image elongation is less than 33%); blend = 0 (ie. image has not been deblended); -3.0 < profile statistic < 3.0 (ie. the areal profile set of the source is close to an idealised PSF set in terms of a 3sigma limit on the N(0,1) profile statistic); quality flag < 128 (ie. any sign of a possibly bad image rejects that image from the view); and limits to exclude the most crowded areas near the Galactic plane and bulge. The use of this, or any other, SSA view depends on the particular science application. If your science application needs a reliable selection of stellar objects but does NOT require high completeness levels, then use this view. Completeness of ReliableStars will be poor in low Galactic latitude regions in particular; note that the Galactic plane region -10 < b < +10 and Galactic bulge region within 20 degrees of the Galactic Centre are not included in this view. If high levels of completeness are required, then use the CompleteStars view. The details and SQL SELECT corresponding to this view are available here. |
| Name | Type | Length | Unit | Description | Default Value | Unified Content Descriptor |
|---|---|---|---|---|---|---|
| objID | bigint | 8 | Unique identifier of merged source | ID_MAIN | ||
| objIDB | bigint | 8 | objID for B band detection merged into this object | 0 | ID_ASSOCIATED | |
| objIDR1 | bigint | 8 | objID for R1 band detection merged into this object | 0 | ID_ASSOCIATED | |
| objIDR2 | bigint | 8 | objID for R2 band detection merged into this object | 0 | ID_ASSOCIATED | |
| objIDI | bigint | 8 | objID for I band detection merged into this object | 0 | ID_ASSOCIATED | |
| htmId | bigint | 8 | Hierarchical Triangular Mesh (20-deep) of centroid | POS_GENERAL | ||
| epoch | real | 4 | year | Epoch of position (variance weighted mean epoch of available measures) | TIME_EPOCH | |
| ra | float | 8 | degrees | Mean RA, computed from detections merged in this catalogue | POS_EQ_RA_MAIN | |
| dec | float | 8 | degrees | Mean Dec, computed from detections merged in this catalogue | POS_EQ_DEC_MAIN | |
| sigRA | float | 8 | degrees | Uncertainty in RA (formal random error not inc. systematic errors) | ERROR | |
| sigDec | float | 8 | degrees | Uncertainty in Dec (formal random error not inc. systematic errors) | ERROR | |
| cx | float | 8 | Cartesian x of unit (ra,dec) vector on celestial sphere | POS_EQ_X | ||
| cy | float | 8 | Cartesian y of unit (ra,dec) vector on celestial sphere | POS_EQ_Y | ||
| cz | float | 8 | Cartesian z of unit (ra,dec) vector on celestial sphere | POS_EQ_Z | ||
| muAcosD | real | 4 | mas/yr | Proper motion in RA direction | -0.99999995e9 | POS_EQ_PMRA |
| muD | real | 4 | mas/yr | Proper motion in Dec direction | -0.99999995e9 | POS_EQ_PMDEC |
| sigMuAcosD | real | 4 | mas/yr | Error on proper motion in RA direction | -0.99999995e9 | ERROR |
| sigMuD | real | 4 | mas/yr | Error on proper motion in Dec direction | -0.99999995e9 | ERROR |
| chi2 | real | 4 | Chi-squared value of proper motion solution | -0.99999995e9 | FIT_CHI2 | |
| Nplates | tinyint | 1 | No. of plates used for this proper motion measurement | NUMBER | ||
| classMagB | real | 4 | mag | B band magnitude selected by B image class | -99.999995 | PHOT_PHG_BJ |
| classMagR1 | real | 4 | mag | R1 band magnitude selected by R1 image class | -99.999995 | PHOT_PHG_R |
| classMagR2 | real | 4 | mag | R2 band magnitude selected by R2 image class | -99.999995 | PHOT_PHG_R |
| classMagI | real | 4 | mag | I band magnitude selected by I image class | -99.999995 | PHOT_PHG_I |
| gCorMagB | real | 4 | mag | B band magnitude assuming object is galaxy | -99.999995 | PHOT_PHG_BJ |
| gCorMagR1 | real | 4 | mag | R1 band magnitude assuming object is galaxy | -99.999995 | PHOT_PHG_R |
| gCorMagR2 | real | 4 | mag | R2 band magnitude assuming object is galaxy | -99.999995 | PHOT_PHG_R |
| gCorMagI | real | 4 | mag | I band magnitude assuming object is galaxy | -99.999995 | PHOT_PHG_I |
| sCorMagB | real | 4 | mag | B band magnitude assuming object is star | -99.999995 | PHOT_PHG_BJ |
| sCorMagR1 | real | 4 | mag | R1 band magnitude assuming object is star | -99.999995 | PHOT_PHG_R |
| sCorMagR2 | real | 4 | mag | R2 band magnitude assuming object is star | -99.999995 | PHOT_PHG_R |
| sCorMagI | real | 4 | mag | I band magnitude assuming object is star | -99.999995 | PHOT_PHG_I |
| meanClass | tinyint | 1 | Estimate of image class based on unit-weighted mean of individual classes | CLASS_OBJECT | ||
| classB | tinyint | 1 | Image classification from B band detection | 0 | CLASS_OBJECT | |
| classR1 | tinyint | 1 | Image classification from R1 band detection | 0 | CLASS_OBJECT | |
| classR2 | tinyint | 1 | Image classification from R2 band detection | 0 | CLASS_OBJECT | |
| classI | tinyint | 1 | Image classification from I band detection | 0 | CLASS_OBJECT | |
| ellipB | real | 4 | Ellipticity of B band detection | -0.99999995e9 | PHYS_ELLIPTICITY | |
| ellipR1 | real | 4 | Ellipticity of R1 band detection | -0.99999995e9 | PHYS_ELLIPTICITY | |
| ellipR2 | real | 4 | Ellipticity of R2 band detection | -0.99999995e9 | PHYS_ELLIPTICITY | |
| ellipI | real | 4 | Ellipticity of I band detection | -0.99999995e9 | PHYS_ELLIPTICITY | |
| qualB | int | 4 | Bitwise quality flag from B band detection | -1 | CODE_QUALITY | |
| qualR1 | int | 4 | Bitwise quality flag from R1 band detection | -1 | CODE_QUALITY | |
| qualR2 | int | 4 | Bitwise quality flag from R2 band detection | -1 | CODE_QUALITY | |
| qualI | int | 4 | Bitwise quality flag from I band detection | -1 | CODE_QUALITY | |
| blendB | int | 4 | Blend flag from B band detection | -99999999 | CODE_MULT_INDEX | |
| blendR1 | int | 4 | Blend flag from R1 band detection | -99999999 | CODE_MULT_INDEX | |
| blendR2 | int | 4 | Blend flag from R2 band detection | -99999999 | CODE_MULT_INDEX | |
| blendI | int | 4 | Blend flag from I band detection | -99999999 | CODE_MULT_INDEX | |
| prfStatB | real | 4 | N(0,1) | Profile statistic from B band detection | -0.99999995e9 | CLASS_STAR/GALAXY |
| prfStatR1 | real | 4 | N(0,1) | Profile statistic from R1 band detection | -0.99999995e9 | CLASS_STAR/GALAXY |
| prfStatR2 | real | 4 | N(0,1) | Profile statistic from R2 band detection | -0.99999995e9 | CLASS_STAR/GALAXY |
| prfStatI | real | 4 | N(0,1) | Profile statistic from I band detection | -0.99999995e9 | CLASS_STAR/GALAXY |
| l | real | 4 | degrees | The Galactic longitude of the source | POS_GAL_LON | |
| b | real | 4 | degrees | The Galactic latitude of the source | POS_GAL_LAT | |
| d | real | 4 | degrees | The great-circle distance of the source from the Galactic centre | POS_ANG_DIST_REL | |
| Ebmv | real | 4 | mag | The estimated foreground reddening at this position from Schlegel et al. (1998) | PHOT_EXTINCTION_GAL | |
| Total length | 262 |