General description: There are one of these files per plate. The file has one HDU. That HDU has one row for every object in photoObjAll that is classified as a star inside a 94.4 arcmin radius of the center of the plate. The data for each object are elements of the photoObjAll, specObjAll, sppPrams and propermotions tables taken unaltered from the CAS and derived quantities calculated by the segue-2 target selection code. Appended to the end are the two target selection bitmasks, segue2_target1 and segue2_target2, as set by the target selection code.
Naming convention: seguetsObjSetAll-XXXX-YYYY-ZZZZ.fits where XXXX is the designid, YYYY is the plateid and ZZZZ is the locationid.
Approximate size: average 43M, up to 155M in fields nearest to the GC
File type: Fits binary table
Read by products: None
Written by products: seguets
Only HDU 1 has data. The header is given below.
-------------- These are taken directly from photoObjAll ----------------- RUN RERUN CAMCOL FIELD OBJ OBJID RA DEC L B FIBERMAG_u FIBERMAG_g FIBERMAG_r FIBERMAG_i FIBERMAG_z PSFMAG_u PSFMAG_g PSFMAG_r PSFMAG_i PSFMAG_z EXTINCTION_u EXTINCTION_g EXTINCTION_r EXTINCTION_i EXTINCTION_z ROWC COLC TYPE FLAGS FLAGS_u FLAGS_g FLAGS_r FLAGS_i FLAGS_z PSFMAGERR_u PSFMAGERR_g PSFMAGERR_r PSFMAGERR_i PSFMAGERR_z ------------- These are taken from the specObjAll and sppParams tables for any objects in this file that have matches in that specObjAll. For objects without matches in specObjAll, values are set to -999. The names from specObjAll are unchanged SPECOBJID PLATE MJD FIBERID BESTOBJID TARGETOBJID SEGUEPRIMTARGET SEGUESECTARGET PRIMTARGET SECTARGET SPPPARAMS_SNA this is SNA from the sppParams table -------------- These are taken from the propermotions table, the USNOB proper motions as recalibrated with the SDSS by Jeff Munn. For objects without matches in the propermotions table, values are set to -999. The names are unchanged from the propermotions table. PMOBJID MATCH DELTA PML PMB PMRA PMDEC PMRAERR PMDECERR PMSIGRA PMSIGDEC NFIT DIST22 DIST20 ---------------- Below this line are the derived quanitites calculated by the procedure calderivedquantities in derivedquant.pro in the segue-2 target selection code. With the addition of these, this file contains all the quanitites that the selection code operates on when choosing targets. uMAG u extinction-corrected (SFD 98) psf magnitude gMAG g "" rMAG r "" iMAG i "" zMAG z "" umg u-g, extinction corrected magnitudes gmr g-r "" rmi r-i "" imz i-z "" gmi g-i "" umgERR PSFMAGERR_u and PSFMAGERR_g added in quadrature gmrERR g and r psfmagerr added in quadrature rmiERR r and i "" imgERR i and z "" PSFMAG_umg psfmag_u-psfmag_g, no extinction correction PSFMAG_gmr psfmag_g-psfmag_r, no extinction correction PSFMAG_rmi psfmag_r-psfmag_i, no extinction correction PSFMAG_imz psfmag_i-psfmag_z, no extinction correction PSFMAG_gmi psfmag_g-psfmag_i, no extinction correction lcolor -0.436*uMag+1.129*gMag-0.119*rMag-0.574*iMag+0.1984 (Lenz et al.1998) scolor -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 p1s 0.91*umg+0.415*umg-1.280 (Helmi et al. 2003) used in SEGUE-1 target selection, unused in SEGUE-2 TOTALPM sqrt(PMRA*PMRA+PMDEC*PMDEC), in mas/year Hg reduced proper motion, gMag+5*log10(TOTALPM/1000)+5 Mi 4.471+7.907*imz-0.837*imz*imz used in SEGUE-1 target selection, unused in SEGUE-2 DISTi 10^((iMag-Mi+5)/5.0) used in SEGUE-1 target selection, unused in SEGUE-2 Hr reduced pm (uncorr r): PSFMAG_r+5*log10(TOTALPM/1000)+5 VMI_TRANS1 VMAG_TRANS-(iMag-0.337*rmi-0.37) VMI_TRANS2 0.877*gmr+0.358 VMAG_TRANS gMag - 0.587*gmr -0.011 MV_TRANS not stuffed DISTV_KPC 10^(dmV/5.-2.) where VMAG_TRANS-(3.37*VMI_TRANS1+2.89) VTRANS_GALREST transvere velocity, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy MUTRANS_GALRADREST 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 MURAD_GALRADREST 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 VTOT_GALRADREST total velocioty, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy ---------------------------------------------------------------------- -------- These were added for the November 2008 drilling run and after -------- The earlier files will be retrofit (eventually) ----------------------------------------------------------------------- MG_TOHV 5.7 + 10.0*(GMR - 0.375) VTRANS_TOHV 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 PM1SIGMA_TOHV Estimate of the 1-sigma error in total proper motion at this r matnigutde. 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. V1SIGMAERR_TOHV The corresponding 1-sigma error in the transverse velocity based on PM1SIGMA_TOHV and the the distance estimate using MG_TOHV ---------------- These are the target selection bitmasks. One bit per target category. All objects are checked against all the science selections, and bits are set for all selection categories that an object passes. These two are the last two elements of the table for all the files SEGUE2_TARGET1 bitmask that records the category or categories for which this object passed the selection criteria SEGUE2_TARGET2 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