TABLE  QsoBest

Contains a record describing the attributes of each QSO Base object and also best Surrogates to fill in the QsoConcordanceAll view.

This table is copied from the 'base' Best..PhotoObjAll Table. It has a row for each object flagged as a QSO (a candidate) and if no candidate exists nearby a Spec or Target candidate then a 'surrogate' Base object is added -- the closest Best within 1.5 asec of the QsoBunch head. If no such surrogate best object can be found, we use the ZERO surrogate (literally, all fields are zero). The test for a best object being a QSO candidate is: primary target flags set to one of TARGET_QSO_HIZ |TARGET_QSO_CAP | TARGET_QSO_SKIRT |TARGET_QSO_FIRST_CAP | TARGET_QSO_FIRST_SKIRT The table also includes the id and summary statistics for matching FIRST and ROSAT objects if they exist, and zero otherwise Includes the absolute magnitude based on Pen (1999) and Pei (1999) if a reliable reshift is available from a specobj object in the bunch.

bestObjIDbigint8  Unique SDSS identifier
headObjIDbigint8 ID_MAINobject ID of bunch head
bestRafloat8deg J2000 right ascension (r')
bestDecfloat8deg J2000 declination (r')
bestCxfloat8 POS_EQ_CART_Xunit vector for ra+dec
bestCyfloat8 POS_EQ_CART_Yunit vector for ra+dec
bestCzfloat8 POS_EQ_CART_Zunit vector for ra+dec
bestPsfMag_ureal4magPHOT_SDSS_UPSF flux
bestPsfMag_greal4magPHOT_SDSS_GPSF flux
bestPsfMag_rreal4magPHOT_SDSS_RPSF flux
bestPsfMag_ireal4magPHOT_SDSS_IPSF flux
bestPsfMag_zreal4magPHOT_SDSS_ZPSF flux
bestPsfMagErr_ureal4mag PSF flux error
bestPsfMagErr_greal4mag PSF flux error
bestPsfMagErr_rreal4mag PSF flux error
bestPsfMagErr_ireal4mag PSF flux error
bestPsfMagErr_zreal4mag PSF flux error
bestExtinction_ureal4mag Extinction in each filter
bestExtinction_greal4mag Extinction in each filter
bestExtinction_rreal4mag Extinction in each filter
bestExtinction_ireal4mag Extinction in each filter
bestExtinction_zreal4mag Extinction in each filter
bestTypeint4  Morphological type classification
bestModeint4  1:primary, 2:secondary, 4:outside survey
bestFlagsbigint8  Photo Object Attribute Flags
bestFlags_ubigint8  Object detection flags per band
bestFlags_gbigint8  Object detection flags per band
bestFlags_rbigint8  Object detection flags per band
bestFlags_ibigint8  Object detection flags per band
bestFlags_zbigint8  Object detection flags per band
bestRowC_ireal4  Row center position (r' coordinates)
bestColC_ireal4  Column center position (r' coordinates)
bestInsideMaskint4  Flag indicates if object is inside a mask
bestPrimTargetint4  Bit mask of primary target categories
bestPriTargHiZint4  1: object flagged as HiZ QSO
bestPriTargLowZint4  1: object flagged as cap|skirt
bestPriTargFirstint4  1: object flagged as first cap|skirt QSO
bestFieldIDbigint8  Link to the field this object is in
bestFieldMjdfloat8  MJD(TAI) Julian Date when row 0 was read
bestFieldQualityint4  Quality of field in terms of acceptance
bestFieldCulledint4  Targets culled from the field
bestFirstIDint4  FIRST catalog id of one matching source
bestFirstPeakfloat8mJy Peak first radio flux
bestRosatIDint4  ID of matching ROSAT source (0 =no match)
bestRosatCpsfloat8ct/s integrated ROSAT counts
bestMifloat8  estimated absolute magnitude based on Pen (1999) and Pei (1999) (or 0)
BestQsoTargetedtinyint1  1: means this was flagged QSO