RAVEPUB_DR5.RAVE_UCAC5

Description

Cross-matching of RAVEDR5 against UCAC5:

  • RAVE fiber has a diameter of 6.7″. The fiber positioning uncertainty is 0.7″ (see DR1 paper). With this in mind the cross-matching radius was set to 4.05″ (6.7 / 2 + 0.7).
  • Cross-matching was done using the J2000 coordinates from both catalogs.
  • For every RAVE star all UCAC5 stars within the matching radius were collected.
  • If there were multiple stars withing the radius the brightest one (in Gaia g-band magnitude) was chosen as the primary. The fluxes of the rest of the stars were added together. The ratio of their fluxes with respect to the primary’s flux was expressed as the contamination ratio (gmag_cont). For example, the value of 0.2 implies that the rest of the stars within the fiber radius contribute 20% of the flux in g-band.
  • While g-band magnitude is available for all cross-matches, some of the stars also have measurements from other bands. r-band and j-band contamination ratios are also available (rmag_cont, jmag_cont). They are computed in the same was as the g-band contamination ratio except using the different bands. Please note that regardless of the band in which the contamination ratio is computed the brightest star (primary) is always defined as the one with the lowest g-band magnitude.
  • Contamination ratios are set to NULL if there is only one UCAC5 star present in the cross-matching radius. If there are more stars, but magnitudes in r- or j-band are not available the contamination ratio is set to -1. This means there is some flux contribution from the surrounding stars but the value is unknown.
  • The distance to the primary matching star is given in the Dist_UCAC5 column.
  • Crossmatch RAVEDR5 and UCAC5 (zone catalog)

    The data can be accessed using the query interface or downloaded at Downloads. Please cite this data set using the unique digital object identifier doi:10.17876/rave/dr.5/029.

    Columns

    ColumnTypeUCDUnitDescription
    RAVE_OBS_IDvarcharmeta.idUnique Identifier for RAVE objects, Observation Date, Fieldname, Fibernumber
    source_idbigintmeta.idGaia source_id
    RAJ2015doublepos.eq.radegGaia Right Ascension (J2015)
    DEJ2015doublepos.eq.decdegGaia Declination (J2015)
    e_RAJ2015doublestat.error
    pos.pm
    pos.eq.ra
    masGaia DR1 position error RA at epoch 2015.0
    e_DEJ2015doublestat.error
    pos.pm
    pos.eq.dec
    masGaia DR1 position error Dec at epoch 2015.0
    flgtinyintmeta.number1=TGAS, 2=other UCAC-Gaia, 3=other NOMAD
    n_Imagestinyintmeta.numberNumber of Images UCAC
    EP_udoubletime.epochyearmean UCAC epoch ( yr after 1997.0)
    RA_udoublepos.eq.radegmean UCAC RA at epu epoch on Gaia reference frame
    DE_udoublepos.eq.decdegdeg mean UCAC Dec at epu epoch on Gaia reference frame
    pmRA_udoublepos.pm
    pos.eq.ra
    mas/yrproper motion RA*cosDEC (UCAC-Gaia)
    pmDE_udoublepos.pm
    pos.eq.dec
    mas/yrproper motion (UCAC-Gaia)
    e_pmRA_udoublestat.error
    pos.pm
    pos.eq.ra
    mas/yrformal error of UCAC-Gaia proper motion RA*cosDec
    e_pmDE_udoublestat.error
    pos.pm
    pos.eq.dec
    mas/yrformal error of UCAC-Gaia proper motion Dec
    gmagfloatphot.mag
    em.opt
    masGaia DR1 G magnitude
    umagfloatphot.mag
    em.opt
    magmean UCAC model magnitude
    rmagfloatphot.mag
    em.opt
    magNOMAD photographic R mag
    Jmagfloatphot.mag
    em.opt
    mag2MASS J magnitude
    Hmagfloatphot.mag
    em.opt
    mag2MASS H magnitude
    Kmagfloatphot.mag
    em.opt
    mag2MASS K magnitude
    Dist_UCAC5floatpos.angDistancearcsecDistance between RAVE and UCAC5 object coordinates in arcsec
    g_contdoublemeta.code.qualg-band flux ratio between contaminators and primary match
    r_contdoublemeta.code.qualr-band flux ratio between contaminators and primary match
    j_contdoublemeta.code.qualj-band flux ratio between contaminators and primary match