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VizieR

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J/ApJ/525/127/table2 RGB sample of BL Lacertae objects (Laurent-Muehleisen+, 1999)
RGB BL Lac Source Properties (127 rows)
  recno=67
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ColumnValue  Explain   (UCD)
_RAJ200015 34 47.2000 "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 54.800 "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 54.3727 "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 51.199 "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)
_Glon059.8600290 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+54.2890088 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)
recno 67  Record number assigned by the VizieR team. Should Not be used for identification.

NameRGB J1534+372  Object ROSAT-Green Bank Survey name
f_Nameb   [bc ] Flag on Name (Note 1)   
Sample    [S] Indicates part of the sample but not a definitive BL Lac object
ONameRX J15347+3716  Other name
RAJ200015 34 47.20 "h:m:s" Right ascension (J2000)
DEJ2000+37 15 54.8 "d:m:s" Declination (J2000)
l_SCore   Limit on SCore
SCore 20 mJy 5Ghz radio flux of the core
XFlux 0.49 10-12mW/m2 X-ray flux in the ROSAT 0.1-2.4 keV band (in units of 10–12 ergs/cm2/s)
Omag18.3 mag Optical magnitude from the Palomar Observatory Sky Survey I
f_Omag    [ad] Flag on the optical magnitudes (Note 2)   
Sp-Index 1.84   X-ray spectral energy index
l_Sp-Index   Limit on Sp-Index
Sp-IndexRO 0.37  Radio - Optical spectral index
Sp-IndexXO 1.55  Optical - X-ray spectral index
l_z   Limit on z
z 0.1430   Redshift
n_z    [ef] Notes on z (Note 3)   
u_z    [?] Indicates an uncertain redshift measurement
r_Name2, 4, 6  Reference numbers to the data in table (see refs.dat)
  
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