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VizieR

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J/ApJ/737/45/table1 Variable 1.4GHz radio sources from NVSS and FIRST (Ofek+, 2011)
Observing times of NVSS sources (1773484 rows)
  recno=1299806
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ColumnValue  Explain   (UCD)
_RAJ200003 13 53.88000 "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+33 58 03.5000 "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)
_RAB195003 10 46.75739 "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+33 46 54.2336 "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)
_Glon153.90337306 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-20.19885746 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)
1299806recno 1299806  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000048.474500 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000+33.967639 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
Sp 4.00 mJy 1.4GHz peak flux (phot.flux.density;em.radio.750-1500MHz)
e_Sp 0.50 mJy The rms in PFlux (stat.error;src.spType)
Nobs 3  Number of observations (meta.number)
t2450345.039 d Mean Julian day of the observation (Note 1)   (time.epoch;obs;stat.mean)
dt 2.975 d Time span of the observations (Note)   (time.interval)

NVSSNVSS  Cross-match with NVSS (Cat. VIII/65) within 1" (meta.ref.url)
  
elapse time 1

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