PhotoTag
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PhotoTag |
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| Member Name/Aliases | Datatype | Description |
|---|---|---|
| objID; id_; object_ID | int64 | The unique identifier for SDSS photometric objects. It is a bit-encoded integer of run,rerun,camcol,field,objid. |
| objType; objc_type; objtype; type | int32 | Classification of the object. This is an enumerated type which assigns a morphological classification
to an object.
OBJ_TYPE_UNK, * Unknown OBJ_TYPE_CR, * Cosmic ray OBJ_TYPE_DEFECT, * Defect OBJ_TYPE_GALAXY, * Galaxy OBJ_TYPE_GHOST, * Ghost OBJ_TYPE_KNOWNOBJ, * Known object OBJ_TYPE_STAR, * Star OBJ_TYPE_TRAIL, * Star trail OBJ_TYPE_SKY, * Sky OBJ_TYPE_NTYPE * ???you can also use AR_OBJECT_TYPE_..instead ofOBJ_TYPE_.. |
| status | int32 | The status field is a bit mask specifying the status of the object in the survey. The bits are defined as:
AR_OBJECT_STATUS_SET = 0x1, * This object's status has been set
* in reference to its own run.
AR_OBJECT_STATUS_GOOD = 0x2, * Good as determined by its
* object flags. Absence implies
* bad. This flag is set by
* "setObjectStatus".
AR_OBJECT_STATUS_DUPLICATE = 0x4, * This object has one or more
* duplicate detections in an
* adjacent field of the same Frames
* Pipeline Run. This is set by
* "setObjectStatus".
AR_OBJECT_STATUS_OK_RUN = 0x10, * Located within the primary range
* of rows for this field. This is
* usable object. This flag is set
* by "setObjectStatus".
AR_OBJECT_STATUS_RESOLVED = 0x20, * This object has been resolved
* against other runs.
AR_OBJECT_STATUS_PSEGMENT = 0x40, * Belongs to a PRIMARY segment.
* This does not imply that this is a
* primary object.
AR_OBJECT_STATUS_FIRST_FIELD= 0x100, * Belongs to the first field in its
* segment. Used to distinguish
* objects in fields shared by two
* segments.
AR_OBJECT_STATUS_OK_SCANLINE= 0x200, * Lies within valid nu range
* for its scanline.
AR_OBJECT_STATUS_OK_STRIPE = 0x400, * Lies within valid eta range for
* its stripe.
AR_OBJECT_STATUS_SECONDARY = 0x1000, * This is a secondary survey object.
AR_OBJECT_STATUS_PRIMARY = 0x2000, * This is a primary survey object.
AR_OBJECT_STATUS_TARGET = 0x4000 * This is a spectroscopic target.
|
| objFlags; objc_flags; flag1; objc_flags2; flag2; objFlags2 | int64 | Detection Flags
OBJECT_CANONICAL_CENTER = 0x1, * used canonical, not local, centre
OBJECT_BRIGHT = 0x2, * detected by Bright Objects
OBJECT_EDGE = 0x4, * object is too close to edge of frame
OBJECT_BLENDED = 0x8, * object is/was blended
OBJECT_CHILD = 0x10, * object is a child
OBJECT_PEAKCENTER = 0x20, * given centre position of peak pixel
OBJECT_NODEBLEND = 0x40, * no deblending attempted
OBJECT_NOPROFILE = 0x80, * too small to estimate a profile
OBJECT_NOPETRO = 0x100, * no Petrosian radius
OBJECT_MANYPETRO = 0x200, * more than one Petrosian radius
OBJECT_NOPETRO_BIG = 0x400, * no Petrosian radius as object is too big
OBJECT_DEBLEND_TOO_MANY_PEAKS = 0x800, * too many peaks to deblend
OBJECT_CR = 0x1000, * contains a CR pixel
OBJECT_MANYR50 = 0x2000, * more than one 50% radius
OBJECT_MANYR90 = 0x4000, * more than one 90% radius
OBJECT_BAD_RADIAL = 0x8000, * some low S/N radial points
OBJECT_INCOMPLETE_PROFILE = 0x10000, * r_P includes off-frame pixels
OBJECT_INTERP = 0x20000, * object contains interpolated pixels
OBJECT_SATUR = 0x40000, * object contains saturated pixels
OBJECT_NOTCHECKED = 0x80000, * object contains NOTCHECKED pixels
OBJECT_SUBTRACTED = 0x100000, * object had wings subtracted
OBJECT_NOSTOKES = 0x200000, * object has no measured stokes params
OBJECT_BADSKY = 0x400000, * sky level so bad that object is -ve
OBJECT_PETROFAINT = 0x800000, * >= 1 Petrosian radius too faint
OBJECT_TOO_LARGE = 0x1000000, * object is too large
OBJECT_DEBLENDED_AS_PSF = 0x2000000, * deblender treated obj as PSF
OBJECT_DEBLEND_PRUNED = 0x4000000, * deblender pruned peak list
OBJECT_ELLIPFAINT = 0x8000000, * Centre's fainter than desired elliptical isophote
OBJECT_BINNED1 = 0x10000000, * object was found in 1x1 binned image
OBJECT_BINNED2 = 0x20000000, * object was found in 2x2 binned image
OBJECT_BINNED4 = 0x40000000, * object was found in 4x4 binned image
OBJECT_MOVED = 0x80000000, * Object appears to have moved during
* the exposure. May have been
* deblended as a moving object.
OBJECT_DEBLENDED_AS_MOVING = 0x100000000, * deblended as a moving object
OBJECT_NODEBLEND_MOVING = 0x200000000, * no deblend of moving object
OBJECT_TOO_FEW_DETECTIONS = 0x400000000, * too few detections to deblend
OBJECT_BAD_MOVING_FIT = 0x800000000, * Fit to moving object was too poor
OBJECT_STATIONARY = 0x1000000000, * velocity is consistent with zero
OBJECT_PEAKS_TOO_CLOSE = 0x2000000000, * at least some peaks were too close,
* and thus merged
OBJECT_MEDIAN_CENTRE = 0x4000000000, * centre is of median-smoothed image
OBJECT_LOCAL_EDGE = 0x8000000000, * per-band centre's too near edge
OBJECT_BAD_COUNTS_ERROR = 0x10000000000, * psf|fiberCountsErr is bad/unknown
OBJECT_BAD_MOVING_FIT_CHILD = 0x20000000000, * moving child's fit was too poor
OBJECT_DEBLEND_UNASSIGNED_FLUX = 0x40000000000, * deblender failed to assign
* enough of flux to children
OBJECT_SATUR_CENTER = 0x80000000000, * object's centre's saturated
OBJECT_INTERP_CENTER = 0x100000000000, * object's centre is very close to at
* least one interpolated pixel
OBJECT_DEBLENDED_AT_EDGE = 0x200000000000, * object is deblended though EDGE
OBJECT_DEBLEND_NOPEAK = 0x400000000000, * object had no detected peak
OBJECT_PSF_FLUX_INTERP = 0x800000000000, * a signifcant amount of PSF's flux
* is interpolated
OBJECT_TOO_FEW_GOOD_DETECTIONS=0x1000000000000, * too few good detections to deblend as moving
OBJECT_CENTER_OFF_AIMAGE = 0x2000000000000, * at least one peak's centre lay
* off the atlas image in some band
OBJECT_MEASURED = 0x1000000000000000, * object has been measured
OBJECT_GROWN_MERGED = 0x2000000000000000, * growing led to a merger
OBJECT_HAS_CENTER = 0x4000000000000000, * OBJC has a canonical centre
OBJECT_MEASURE_BRIGHT = 0x8000000000000000 * object should be measured bright
|
| primTarget | int32 | The primTarget field is a bit mask specifying which primary target catagories the object was selected in. The bits are defined as:
AR_TARGET_QSO_HIZ = 0x1, AR_TARGET_QSO_CAP = 0x2, AR_TARGET_QSO_SKIRT = 0x4, AR_TARGET_QSO_FIRST_CAP = 0x8, AR_TARGET_QSO_FIRST_SKIRT = 0x10, AR_TARGET_QSO_FAINT = 0x2000000, AR_TARGET_QSO_REJECT = 0x20000000, AR_TARGET_GALAXY_RED = 0x20, AR_TARGET_GALAXY_RED_II = 0x4000000, AR_TARGET_GALAXY = 0x40, AR_TARGET_GALAXY_BIG = 0x80, AR_TARGET_GALAXY_BRIGHT_CORE= 0x100, AR_TARGET_ROSAT_A = 0x200, AR_TARGET_ROSAT_B = 0x400, AR_TARGET_ROSAT_C = 0x800, AR_TARGET_ROSAT_D = 0x1000, AR_TARGET_ROSAT_E = 0x8000000, AR_TARGET_STAR_BHB = 0x2000, AR_TARGET_STAR_CARBON = 0x4000, AR_TARGET_STAR_BROWN_DWARF = 0x8000, AR_TARGET_STAR_SUB_DWARF = 0x10000, AR_TARGET_STAR_CATY_VAR = 0x20000, AR_TARGET_STAR_RED_DWARF = 0x40000, AR_TARGET_STAR_WHITE_DWARF = 0x80000, AR_TARGET_STAR_PN = 0x10000000, AR_TARGET_SERENDIP_BLUE = 0x100000, AR_TARGET_SERENDIP_FIRST = 0x200000, AR_TARGET_SERENDIP_RED = 0x400000, AR_TARGET_SERENDIP_DISTANT = 0x800000, AR_TARGET_SERENDIP_MANUAL = 0x1000000 |
| secTarget | int32 | The secTarget field is a bit mask specifying which secondary target catagories the object was selected in. The bits are defined as:
TAR_TARGET_LIGHT_TRAP = 0x1, TAR_TARGET_REDDEN_STD = 0x2, TAR_TARGET_TEST_TARGET = 0x4, TAR_TARGET_QA = 0x8, TAR_TARGET_SKY = 0x10, TAR_TARGET_SPECTROPHOTO_STD = 0x20, TAR_TARGET_GUIDE_STAR = 0x40, TAR_TARGET_BUNDLE_HOLE = 0x80, TAR_TARGET_QUALITY_HOLE = 0x100, TAR_TARGET_HOT_STD = 0x200 |
| rowC; objc_rowc; objRowc | float32 | Nominal row position (r' coordinates) in pixels |
| colC; objc_colc; objColc | float32 | Nominal column position (r' coordinates) in pixels |
| lStar_r; star_L_r | float32 | Star likelihood, r band |
| lExp_r; exp_L_r | float32 | Exponential disk fit likelihood, r band |
| lDeV_r; deV_L_r | float32 | DeVaucouler fit likelihood, r band |
| u | float64 | Better of DeV/Exp mag fit. (luptitudes) |
| g | float64 | Better of DeV/Exp mag fit. (luptitudes) |
| r | float64 | Better of DeV/Exp mag fit. (luptitudes) |
| i | float64 | Better of DeV/Exp mag fit. (luptitudes) |
| z | float64 | Better of DeV/Exp mag fit. (luptitudes) |
| psfMag; psfCounts | float32[5] | PSF flux. (luptitudes) |
| fiberMag; fiberCounts | float32[5] | Flux in 3 arcsec diameter fiber radius. (luptitudes) |
| petroMag; petroCounts | float32[5] | Petrosian flux. (luptitudes) |
| petroRad | float32[5] | Petrosian radius. (arcsecs) |
| reddening | float32[5] | Reddening in each filter (magnitudes) |
| petroR50_r | float32 | r-band radius containing 50% of Petrosian flux. (arcsecs) |
| petroR90_r | float32 | r-band radius containing 90% of Petrosian flux. (arcsecs) |
| rho | float32 | Surface brightness parameter (5 * log petro-rad_i) |
| cx | float64 | Unit x-vector for RA+dec. |
| cy | float64 | Unit y-vector for RA+dec. |
| cz | float64 | Unit z-vector for RA+dec. |
| htmID | int64 | Level 20 HTM ID |
| modelFluxID | int32 | KD-tree ID for flux space (model flux). |
| psfFluxID | int32 | KD-tree ID for flux space (PSF flux). |
| petroFluxID | int32 | KD-tree ID for flux space (Petrosian flux). |
| nChild; nchild; nChildren | int32 | Number of children if this is a composite object that has been deblended. BRIGHT (in a flags sense) objects also have nchild == 1, the non-BRIGHT sibling. |
| photoobj; PhotoObj; obj; pobj | OneAssoc(PhotoObj) | Link to the corresponding photo object. |
| profile; Profile | OneAssoc(Profile) | Link to the profile parameters for this object |
| field; Field | OneAssoc(Field) | Link to the corresponding field object |
| child | ManyAssoc(PhotoTag) | Link to the deblended children of this object, if any |
| parent | OneAssoc(PhotoTag) | Link to the parent object if this object has been deblended |
| secondary | ManyAssoc(PhotoTag) | Link to all secondaries of this object if it is a primary |
| primary | ManyAssoc(PhotoTag) | Link to the primary object(s) if this object is a secondary. How can you have more than one primary? It can happen that the secondary object was observed under worse seeing conditions and that it has not been deblended into two or more objects whereas the primary has. |
| seclist | ManyAssoc(PhotoTag) | Link to other secondary objects if this is a secondary object. |
| photoz; PhotoZ | OneAssoc(PhotoZ) | Link to the photometric redshift object. |
| specobj; SpecObj; spec | ManyAssoc(SpecObj) | Link to the spectrum of this object, if observed. |
| externalcatalog; ExternalCatalog; extern | ManyAssoc(ExternalCatalog) | Link to external catalog associations, if any. |