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J/ApJS/222/25
  Long-term optical monitoring of E1821+643 (Shapovalova+, 2016)
timeSerie
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1.J/ApJS/222/25/table1The measured photometric magnitudes [timeSerie](plot) (98 rows)
2.J/ApJS/222/25/table3Log of spectroscopic observations (127 rows)
3.J/ApJS/222/25/table5Measured line and continuum fluxes [timeSerie](Hb and Hg plot and Continuum plot) (127 rows)
4.J/ApJS/222/25/table7Measured broad-line and line-segment fluxes of Hβ [timeSerie](plot) (127 rows)

 
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Column  Constraint Explain   (UCD)
  (ALL)recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
   (ALL)Seq  Photometric Observation Running Number (meta.id;meta.main)
  (1+2+3)Date "Y:M:D" (n)UT observation date (time.epoch;obs)
   (ALL)JD d Modified Julian Date, JD-2400000 (time.epoch)
  (1+2)Seeing arcsec [1/4.1] Mean Photometric Observation Seeing (instr.obsty.seeing;obs;stat.mean)
  (1)Rmag mag (n) [13.4/14] R band magnitude (phot.mag;em.opt.R)
  (1)e_Rmag mag (n) [0.009/0.04] Uncertainty in Rmag (stat.error;phot.mag;em.opt.R)
  (1)Vmag mag [14.6/15.3] V band magnitude (phot.mag;em.opt.V)
  (1)e_Vmag mag [0.008/0.04] Uncertainty in Vmag (stat.error;phot.mag;em.opt.V)
  (1)Bmag mag [13.7/14.6] B band magnitude (phot.mag;em.opt.B)
  (1)e_Bmag mag [0.009/0.04] Uncertainty in Bmag (stat.error;phot.mag;em.opt.B)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)Code (char) Spectroscopic Observation Code (Note 1)   (meta.id;obs)
  (2)ApX arcsec Projected spectrograph entrance aperture in X (instr.fov)
  (2)ApY arcsec Projected spectrograph entrance aperture in Y (instr.fov)
  (2)Spmin 0.1nm [3700/6060] Spectral Range, minimum in Angstroms (em.wl)
  (2)Spmax 0.1nm [6630/7690] Spectral Range, maximum in Angstroms (em.wl)
  (2)B_Seeing arcsec (n) [2.5] Spectroscopic Observation Seeing, Maximum (instr.obsty.seeing;obs)
  (3)F(5100) 10-17W/m2/nm [4.9/10.7] Continuum flux at 5100Å, rest frame, in 10-15erg/cm2/s/A (phot.flux)
  (3)e_F(5100) 10-17W/m2/nm [0.1/0.3] Uncertainty in F(5100), in 10-15erg/cm2/s/A (stat.error)
  (3)Hbeta 10-16W/m2 [10.8/15.2] Hβ line flux, in 10-13erg/cm2/s (phot.flux;em.line.Hbeta;spect.line)
  (3)e_Hbeta 10-16W/m2 [0.3/0.5] Uncertainty in Hbeta, in 10-13erg/cm2/s (stat.error)
  (3)F(4200) 10-17W/m2/nm(n) [6.5/14] Continuum flux at 4200Å, rest frame, in 10-15 erg/cm2/s/A (phot.flux)
  (3)e_F(4200) 10-17W/m2/nm(n) [0.2/0.5] Uncertainty in F(4200), in 10-15 erg/cm2/s/A (stat.error)
  (3)Hgamma 10-16W/m2(n) [1.9/4.2] Hγ line flux, in 10-13erg/cm2/s (phot.flux;em.line.Hgamma;spect.line)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (3)e_Hgamma 10-16W/m2(n) [0.1/0.3] Uncertainty in Hgamma, in 10-13erg/cm2/s (stat.error)
  (4)Hb-broad 10-13mW/m2 [6.4/11.3] Flux of broad Hβ, total line (phot.flux)
  (4)e_Hb-broad 10-13mW/m2 [0.1/0.4] Uncertainty in Hb-broad (stat.error)
  (4)Hb-blue 10-13mW/m2 [0.6/1.2] Flux of broad Hβ line-segments, blue (phot.flux)
  (4)e_Hb-blue 10-13mW/m2Uncertainty in Hb-blue (stat.error)
  (4)Hb-core 10-13mW/m2 [3.2/5.9] Flux of broad Hβ line-segments, core (phot.flux)
  (4)e_Hb-core 10-13mW/m2Uncertainty in Hb-core (stat.error)
  (4)Hb-red 10-13mW/m2 [1.5/3] Flux of broad Hβ line-segments, red (phot.flux)
  (4)e_Hb-red 10-13mW/m2Uncertainty in Hb-red (stat.error)
  (4)Hb-far 10-13mW/m2 [0.5/1.2] Flux of broad Hβ line-segments, far red (phot.flux)
  (4)e_Hb-far 10-13mW/m2Uncertainty in Hb-far (stat.error)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
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