TABLE  QsoTarget

This table is copied from the 'base' Target..PhotoObjAll Table. It has a row for each object flagged as a QSO (a candidate) and if no candidate exists nearby a Spec or Photo candidate then a 'surrogate' Target object is added -- the closest target within 1.5 asec of the QsoBunch head. If no such surrogate Target object can be found, we use the ZERO surrogate (literally, all fields are zero). The test for a target 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 Also includes the absolute magnitude based on Pen (1999) and Pei (1999) if a reliable reshift available from a specobj object in the bunch.

name	type	length	unit	ucd	description
targetObjID	bigint	8			SDSS identifier
headObjID	bigint	8		ID_MAIN	object ID of bunch head
targetRa	float	8	deg		J2000 right ascension (r')
targetDec	float	8	deg		J2000 declination (r')
targetCx	float	8		POS_EQ_CART_X	unit vector for ra+dec
targetCy	float	8		POS_EQ_CART_Y	unit vector for ra+dec
targetCz	float	8		POS_EQ_CART_Z	unit vector for ra+dec
targetPsfMag_u	real	4	mag	PHOT_SDSS_U	PSF flux
targetPsfMag_g	real	4	mag	PHOT_SDSS_G	PSF flux
targetPsfMag_r	real	4	mag	PHOT_SDSS_R	PSF flux
targetPsfMag_i	real	4	mag	PHOT_SDSS_I	PSF flux
targetPsfMag_z	real	4	mag	PHOT_SDSS_Z	PSF flux
targetPsfMagErr_u	real	4	mag		PSF flux error
targetPsfMagErr_g	real	4	mag		PSF flux error
targetPsfMagErr_r	real	4	mag		PSF flux error
targetPsfMagErr_i	real	4	mag		PSF flux error
targetPsfMagErr_z	real	4	mag		PSF flux error
targetExtinction_u	real	4	mag		Extinction in each filter
targetExtinction_g	real	4	mag		Extinction in each filter
targetExtinction_r	real	4	mag		Extinction in each filter
targetExtinction_i	real	4	mag		Extinction in each filter
targetExtinction_z	real	4	mag		Extinction in each filter
targetType	int	4			Morphological type classification of object.
targetMode	int	4			1:primary, 2:secondary,4:outside survey.
targetStatus	int	4			ôphotoStatusö flags of this object
targetFlags	bigint	8			Photo Object Attribute
targetFlags_u	bigint	8			Object detection flags per band
targetFlags_g	bigint	8			Object detection flags per band
targetFlags_r	bigint	8			Object detection flags per band
targetFlags_i	bigint	8			Object detection flags per band
targetFlags_z	bigint	8			Object detection flags per band
targetRowC_i	real	4			Row center position (r' coordinates)
targetColC_i	real	4			Column center position (r' coordinates)
targetInsideMask	int	4			Flag tells if object inside a mask & why
targetPrimTarget	int	4			Bit mask of primary target categories
targetPriTargHiZ	int	4			1: object flagged as HiZ QSO
targetPriTargLowZ	int	4			1: object flagged as cap|skirt QSO
targetPriTargFirst	int	4			1: object flagged as first cap|skirt QSO
targetFieldID	bigint	8			Field this object is in
targetFieldMjd	float	8			MJD(TAI) Julian Date row 0 was read
targetFieldQuality	int	4			Quality of field
targetFieldCulled	int	4			Targets culled from the field
targetSectorID	bigint	8			The sector covering this object or 0
targetFirstID	int	4			matching FIRST catalog id or 0
targetFirstPeak	float	8			Peak first radio flux
targetRosatID	int	4			matching ROSAT source (0 = no match)
targetRosatCps	float	8	ct/s --		integrated ROSAT counts
targetMi	float	8			estimated absolute magnitude based on Pen (1999) (or 0)
TargetQsoTargeted	tinyint	1			1 means this was targeted as a QSO
targetUniform	bit	1			boolean: part of the uniform QSO sample