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J/other/NewA/16.503/table1 2MASS observation of BL Lac objects II. (Mao+, 2011)
2MASS observational data of 833 BL Lacs (833 rows)
  recno=609
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ColumnValue  Explain   (UCD)
_RAJ200015 01 01.8300 "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+22 38 06.200 "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)
_RAB195014 58 47.8336 "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+22 49 54.877 "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)
_Glon031.4455918 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+60.3503009 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)
609recno 609  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Seq609  Sequential number (meta.record)
NameMS 14588+2249  Source name (meta.id;meta.main)
z 0.235   Confirmed redshift or lower limit (src.redshift)
l_z    [a] a if redshift lower limit (meta.code.error;src.redshift)
TypeHP  Type Source type adopted from the VV13 (Cat. VII/258) catalog (Note 1)   (src.class)
FBL?Y   [Y] Y if this BL Lac is in the LAC sample (Fermi-detected BL Lac, FBL) (meta.code)
NOMAD1126-0281454  NOMAD (Cat. I/297) counterpart designation (meta.id)
2MASS15010183+2238062  2MASS (Cat. II/246) counterpart designation (meta.id)
n_2MASS    [*] * when source having more than one 2MASS counterpart (meta.note)
r1 0.92 arcsec Position difference between BL Lac and NOMAD counterpart positions (pos;arith.diff)
r2 0.09 arcsec Position difference between BL Lac and 2MASS counterpart positions (pos;arith.diff)
Jmag13.621 mag 2MASS J magnitude (phot.mag;em.IR.J)
e_Jmag 0.026 mag rms uncertainty on Jmag (stat.error;phot.mag;em.IR.J)
Hmag12.933 mag 2MASS H magnitude (phot.mag;em.IR.H)
e_Hmag 0.036 mag rms uncertainty on Hmag (stat.error;phot.mag;em.IR.H)
Ksmag12.153 mag 2MASS Ks magnitude (phot.mag;em.IR.K)
e_Ksmag 0.027 mag rms uncertainty on Ksmag (stat.error;phot.mag;em.IR.K)
Q2MAAA   [ABCDEU] 2MASS quality flags (Note 2)   (meta.code.qual)
AV 0.159 mag Interstellar extinction coefficients from NED (phys.absorption)
n_AVb   [Sb] Note on AV (Note 3)   (meta.note)
alf.IR 0.83   NIR spectral index α such that Fν∝ν–α (spect.index)
e_alf.IR 0.06   rms uncertainty on alf.IR (stat.error)
logFp15.26 [Hz] Synchrotron peak frequency (em.freq)
r_logFp1   Reference for Fpeak (Note 4)   (meta.ref;pos.frame)
dH    Curvature parameter of the NIR spectrum, δH (stat.fit.param)
n_dH    [c] c for low confidence curvature (meta.note)
e_dH    rms uncertainty on dH (stat.error)

NEDNED  ask the NED data-base about this object (meta.ref.url)
_RA225.25762 deg (i) Position from 2MASS counterpart (right ascension part) (pos.eq.ra;meta.main)
_DE+22.63506 deg (i) Position from 2MASS counterpart (declination part) (pos.eq.dec;meta.main)
  
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