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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=389213
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ColumnValue  Explain   (UCD)
_RAJ200015 01 01.83600 "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 06.5180 "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 47.83971 "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 55.1951 "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)
_Glon031.44577637 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+60.35030213 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)
389213recno 389213  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000225.257650 deg (i) Right Ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
DEJ2000+22.635144 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
Sp 28.74 mJy 1.4GHz peak flux (phot.flux.density;em.radio.750-1500MHz)
e_Sp 0.14 mJy The rms in PFlux (stat.error;src.spType)
Nobs 3  Number of observations (meta.number)
t2450082.128 d Mean Julian day of the observation (Note 1)   (time.epoch;obs;stat.mean)
dt 4.986 d Time span of the observations δt (Note 1)   (time.interval)

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

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