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J/other/NewA/11.27/table1 2MASS observation of BL Lac objects (Chen+, 2005)
2MASS observations of BL Lac objects (511 rows)
  recno=58
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ColumnValue  Explain   (UCD)
_RAJ200002 08 38.1700 "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+35 23 12.900 "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)
_RAB195002 05 39.5263 "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+35 09 01.315 "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)
_Glon140.2105033 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-24.8812636 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)
58recno 58  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Seq100  Sequential number (meta.record)
NameMS 02057+3509  BL Lac object Name (meta.id;meta.main)
USNO1200-00904427  USNO-A2 or USNO-B1 number (meta.id)
n_USNOA   [AB] USNO-A2 (A) or USNO-B1 (B) (meta.note)
RAJ200002 08 38.17 "h:m:s" (i) 2MASS Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+35 23 12.9 "d:m:s" (i) 2MASS Declination (J2000) (pos.eq.dec;meta.main)
r1 0.24 arcsec Distance between BL Lac object and related USNO source (pos.angDistance)
r2 0.30 arcsec Distance between USNO source and related 2MASS source (pos.angDistance)
Vmag19.24 mag V magnitude (phot.mag;em.opt.V)
Jmag16.705 mag 2MASS J magnitude (phot.mag;em.IR.J)
n_Jmag    [*] * indicates an upper limit for Jmag (meta.note)
e_Jmag 0.131 mag rms uncertainty on Jmag (stat.error;phot.mag;em.IR.J)
Hmag15.993 mag 2MASS H magnitude (phot.mag;em.IR.H)
n_Hmag    [*] * indicates an upper limit for Hmag (meta.note)
e_Hmag 0.167 mag rms uncertainty on Hmag (stat.error;phot.mag;em.IR.H)
Kmag15.107 mag 2MASS K magnitude (phot.mag;em.IR.K)
n_Kmag    [*] * indicates an upper limit for Kmag (meta.note)
e_Kmag 0.140 mag rms uncertainty on Kmag (stat.error;phot.mag;em.IR.K)
alpha(J-K) 0.99   Power spectral index between J and K bands (spect.index)
z 0.318   Redshift (src.redshift)
TypepBL  Type of object (Note 1)   (src.class)
rad    [*st ] Radio note (Note 2)   (meta.note)
u_Av    [)] Uncertainty flag on Av (meta.code.error)
Av 0.334 mag Interstellar extinction coefficient Av (phys.absorption.coeff)
Host    [#] #: possible influence from the host galaxy (meta.note)

LinksLinks  Extract data from nearby sources in Véron (VII/248), 2MASS (II/246), USNO (I/252, I/284), NOMAD (I/297) (meta.ref.url)
  
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