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VizieR

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J/AJ/135/2453/BLLac Sample of BL Lac objects from SDSS and FIRST (Plotkin+, 2008)
Observed (table5) and derived (table6) parameters of BL Lac candidates (501 rows)
  recno=432
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ColumnValue  Explain   (UCD)
_RAJ200015 34 47.2104 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+37 15 54.540 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195015 32 54.3830 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+37 25 50.938 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon059.8599011 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+54.2889800 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
432recno 432  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

SDSS153447.21+371554.5  SDSS Name (HHMMSS.ss+DDMMSS.s) (linked to SDSS data) (meta.id;meta.main)
ClassBL   [BL? ] higher confidence BL Lac class (BL), or lower confidence BL Lac class (BL?) (src.class)
NO   [NSO] Source in NED as BL Lac? (Note 3)   (meta.code)
umag18.38 mag SDSS u-band psf magnitude (phot.mag;em.opt.U)
gmag17.84 mag SDSS g-band psf magnitude (phot.mag;em.opt.B)
rmag17.34 mag SDSS r-band psf magnitude (phot.mag;em.opt.R)
imag17.04 mag SDSS i-band psf magnitude (phot.mag;em.opt.I)
zmag16.82 mag SDSS z-band psf magnitude (phot.mag;em.opt.I)
z 0.143   Redshift from SDSS spectroscopy (src.redshift)
q_zR   [LRTU] z quality (Note 4)   (meta.code.qual;src.redshift)
C 0.166   Measured H/K break strength (Note 5)   (spect.line.intensity)
f1.4 22.14 mJy Integrated FIRST 1.4GHz observed flux density (phot.flux.density;em.radio.750-1500MHz)
CommA07  Additional comments (Note 6)   (meta.note)

SimbadNameSDSS J153447.20+371554.6  Designation understandable by the Simbad data-base (meta.id)
NEDNED  ask the NED data-base about this object

logL531.15 [10-7W/Hz] Calculated monochromatic radio luminosity at rest frame 5GHz in erg/s/Hz (log scale) (phys.luminosity;em.radio;meta.modelled)
Omag17.29 mag Extinction corrected optical magnitude in filter closest to rest frame 500nm (phot.mag;em.opt)
logLopt29.27 [10-7W/Hz] Calculated monochromatic optical luminosity at rest frame 500nm (5000Å) (log scale) (phys.luminosity)
XY   [Y/N] Source is a RASS X-ray source? (Note 8)   (meta.code)
Xrate 0.029 ct/s RASS measured X-ray count rate (Note 8)   (phot.count;em.X-ray)
logLx25.35 [10-7W/Hz] Calculated monochromatic X-ray luminosity at rest frame 1keV in erg/s/Hz (log scale) (Note 8)   (phys.luminosity)
SI.RO 0.37  Broad-band radio/optical spectral index (spect.index)
SI.OX 1.50  Broad-band optical/X-ray spectral index (spect.index)
SI.RX 0.75  Broad-band radio/X-ray spectral index (spect.index)

DR5DR5  Details of the photometry from the SDSS-DR5 (meta.ref.url)

RAJ2000233.69671 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000+37.26515 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
  
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