Data model: ssppTargets

General description: The SEGUE targeting information for all fibers associated with a given plate. The format is the same as the full target files.

Naming convention: segueTargetPlate-PLATE4-MJD.fits

Approximate size: 360 kbytes

File type: FITS

Read by products: sas

Written by products: sas

Required column names

• RUN (int64): Run number
• RERUN (int64): Rerun number
• CAMCOL (int64): Camera column number
• FIELD (int64): Field number
• OBJ (int64): Object
• RA (float64): RA (degree)
• DEC (float64): Dec (degree)
• L (float64): Galactic longitude (degree)
• B (float64): Galactic latitude (degree)
• FIBERMAG (float32): u band fiber magnitudue (mag)
• PSFMAG (float32): u band PSF magnitude (mag)
• EXTINCTION (float32): u band extinction (mag)
• ROWC (int32): row centroid (pix)
• COLC (int32): column centroid (pix)
• TYPE (int32): object type from photometric reductions
• FLAGS (int64): combined flags from all bands
• FLAGS (int64): u band flag
• PSFMAGERR (float32): Error in u band PSF magnitude (mag)
• SPECOBJID (int64): Spectroscopic object ID
• PLATE (int64): Plate number
• MJD (int64): Modified Julian Date
• FIBERID (int64): Fiber number
• BESTOBJID (int64): Best object ID
• TARGETOBJID (int64): Target object ID
• SEGUEPRIMTARGET (int32): SEGUE primary target
• SEGUESECTARGET (int32): SEGUE secondary target
• PRIMTARGET (int32): Primary target
• SECTARGET (int32): Secondary target
• sppparams_sna (float64): Average signal-to-noise ratio. This is SNA from the sppParams table
• PMOBJID (int64): Proper motion object ID
• MATCH (int64): Number of objects in USNO-B which matched this object within a 1 arcsec radius. If negative, then the nearest matching USNO-B object itself matched more than 1 SDSS object.
• DELTA (float64): Distance between this object and the nearest matching USNO-B object (arcsec)
• PML (float64): Proper motion in Galactic longitude (mas/yr)
• PMB (float64): Proper motion in Galactic latitude (mas/yr)
• PMRA (float64): Proper motion in RA (mas/yr)
• PMDEC (float64): Proper motion in DEC (mas/yr)
• PMRAERR (float64): Proper motion error in RA (mas/yr)
• PMDECERR (float64): Proper motion error in DEC (mas/yr)
• PMSIGRA (float64): RMS residual for the proper motion fit in R.A. (mas)
• PMSIGDEC (float64): RMS residual for the proper motion fit in Dec. (mas)
• NFIT (int32): Number of detections used in the fit including the SDSS detection (thus, the number of plates the object was detected on in USNO-B plus one).
• DIST22 (float64): Distance to the nearest neighbor with g < 22 (arcsec)
• DIST20 (float64): Distance to the nearest neighbor with g < 20 (arcsec)
• uMAG (float32): u extinction-corrected (SFD 98) psf magnitude (mag)
• gMAG (float32): g extinction-corrected (SFD 98) psf magnitude (mag)
• rMAG (float32): r extinction-corrected (SFD 98) psf magnitude (mag)
• iMAG (float32): i extinction-corrected (SFD 98) psf magnitude (mag)
• zMAG (float32): z extinction-corrected (SFD 98) psf magnitude (mag)
• umg (float32): u-g, extinction corrected magnitudes (mag)
• gmr (float32): g-r, extinction corrected magnitudes (mag)
• rmi (float32): r-i, extinction corrected magnitudes (mag)
• imz (float32): i-z, extinction corrected magnitudes (mag)
• gmi (float32): g-i, extinction corrected magnitudes (mag)
• umgERR (float32): PSFMAGERR_u and PSFMAGERR_g added in quadrature (mag)
• gmrERR (float32): PSFMAGERR_g and PSFMAGERR_r added in quadrature (mag)
• rmiERR (float32): PSFMAGERR_r and PSFMAGERR_i added in quadrature (mag)
• imzERR (float32): PSFMAGERR_i and PSFMAGERR_z added in quadrature (mag)
• psfmag_umg (float32): psfmag_u-psfmag_g, no extinction correction (mag)
• psfmag_gmr (float32): psfmag_g-psfmag_r, no extinction correction (mag)
• psfmag_rmi (float32): psfmag_r-psfmag_i, no extinction correction (mag)
• psfmag_imz (float32): psfmag_i-psfmag_z, no extinction correction (mag)
• psfmag_gmi (float32): psfmag_g-psfmag_i, no extinction correction (mag)
• lcolor (float32): -0.436*uMag+1.129*gMag-0.119*rMag-0.574*iMag+0.1984 (Lenz et al.1998) (mag)
• scolor (float32): -0.249*uMag+0.794*gMag-0.555*rMag+0.234+0.011*p1s-0.010 (Helmi et al. 2003) used in SEGUE-1 target selection, unused in SEGUE-2 (mag)
• p1s (float32): 0.91*umg+0.415*umg-1.280 (Helmi et al. 2003) used in SEGUE-1 target selection, unused in SEGUE-2 (mag)
• TOTALPM (float32): sqrt(PMRA*PMRA+PMDEC*PMDEC), in mas/year (mas)
• Hg (float32): reduced proper motion, gMag+5*log10(TOTALPM/1000)+5 (mag)
• Mi (float32): 4.471+7.907*imz-0.837*imz*imz used in SEGUE-1 target selection, unused in SEGUE-2 (mag)
• DISTi (float32): 10^((iMag-Mi+5)/5.0) used in SEGUE-1 target selection, unused in SEGUE-2 (mag)
• Hr (float32): reduced pm (uncorr r): PSFMAG_r+5*log10(TOTALPM/1000)+5 (mag)
• vmi_trans1 (float32): V-I from VMAG_TRANS-(iMag-0.337*rmi-0.37) (mag)
• vmi_trans2 (float32): V-I from 0.877*gmr+0.358 (mag)
• vmag_trans (float32): V mag from gMag - 0.587*gmr -0.011 (mag)
• distv_kpc (float32): 10^(dmV/5.-2.) where VMAG_TRANS-(3.37*VMI_TRANS1+2.89) (kpc)
• vtrans_galrest (float32): transvere velocity, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy (km)
• mutrans_galradrest (float32): derived PM (mas/year) perpendicular to the Galactocentric radial vector, assuming all motion is along a Galactocentric radial vector, in a frame at rest w.r.t the Galaxy (mas)
• murad_galradrest (float32): derived PM (mas/year) along the Galactocentric radial vector, assuming all motion is along a Galactocentric radial vector, in a frame at rest w.r.t the Galaxy (mas)
• vtot_galradrest (float32): total velocioty, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy (km)
• mg_tohv (float32): 5.7 + 10.0*(GMR - 0.375) (mag)
• vtrans_tohv (float32): transverse velocity in Galactocentric coords, using the distance estimate from MG_TOHV which is appropriate for old stars near the MSTO and corrected for peculiar solar motion 16.6 km/s toward RA,Dec 267.5,28.1 (km)
• pm1sigma_tohv (float32): Estimate of the 1-sigma error in total proper motion at this r magnitude. Formula is sqrt(4.56*4.56 + frate*2.30*2.30), where frate is 10^(0.4*(rMag-19.5)). The constants come from the Munn et al. 2004 (AJ, 127, 3034) paper describing the recalibration of USNOB with SDSS. (mas)
• v1sigmaerr_tohv (float32): The corresponding 1-sigma error in the transverse velocity based on PM1SIGMA_TOHV and the the distance estimate using MG_TOHV (km)
• segue2_target1 (int32): bitmask that records the category or categories for which this object passed the selection criteria
• segue2_target2 (int32): bitmask that records the category or categories of "standards" for the pipeline, special calibration targets like Stetson standards or globular cluster stars, for which this object passed the selection criteria
• TARGET_VERSION (string): version of target used