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VizieR

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J/ApJ/737/45/table2 Variable 1.4GHz radio sources from NVSS and FIRST (Ofek+, 2011)
Observing Times of FIRST Sources (816331 rows)
  recno=458373
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ColumnValue  Explain   (UCD)
_RAJ200012 59 19.84993 "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+28 05 03.9190 "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)
_RAB195012 56 55.07572 "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+28 21 13.7140 "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)
_Glon062.05752718 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+88.00711276 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)
458373recno 458373  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000194.832708 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000+28.084422 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
Sp 1.96 mJy 1.4GHz peak flux (phot.flux.density;em.radio.750-1500MHz)
e_Sp 0.18 mJy The rms in PFlux (stat.error;src.spType)
Nobs 5  Number of observations (meta.number)
t2449460.360 d Mean Julian day of the observation (Note 1)   (time.epoch;obs;stat.mean)
dt 978.300 d Time span of the observations δt (Note 1)   (time.interval)

FIRSTFIRST  Cross-match with FIRST (Cat. VIII/90) within 1" (meta.ref.url)
  
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