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J/ApJS/247/27
  Swift obs. of Mrk 421. III. 2015 Dec-2018 Apr (Kapanadze+, 2020)
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1.J/ApJS/247/27/table2Summary of the XRT and UVOT observations in the time interval 2015 December-2018 April [timeSerie] (Interactive plot)
timeSerie
(299 rows)
2.J/ApJS/247/27/table4The 0.3-10keV intraday variabilities (IDVs) during 2015 December-2018 April (141 rows)
3.J/ApJS/247/27/table5The Optical-UV and γ-ray IDVs during 2015 December-2018 April (44 rows)
4.J/ApJS/247/27/table6Results of the Swift-XRT spectral analysis with the log-parabolic model (886 rows)
5.J/ApJS/247/27/table10Results of the XRT spectral analysis with a simple power-law model (94 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)
  (1+4+5)obsID   [10474002/93249013] Swift observation identifier (meta.id;obs.param;obs)
  (1)st s (n)UTC date of observation start (time.start;obs)
  (1)UTEnd "h:m:s" (n)UTC time of observation end (time.epoch)
  (1)UTOff d (n) [1] Offset in days if UTEnd is on a different UT Date (time.interval)
  (1+2)MJD d Modified Julian Date, observation start (time.epoch)
  (1)Exp s (n) [45/6021] Exposure time (time.duration;obs.exposure)
  (1)XRT ct/s (n) [7/163] Observation-binned 0.3-10keV count rate (phot.count;em.X-ray)
  (1)e_XRT ct/s (n) [0.08/1.5] Uncertainty in XRT (stat.error)
  (1)uvw1mag mag (n) [11/12.6] De-reddened Swift/UVOT uvw1 band magnitude (phot.mag;em.UV)
  (1)e_uvw1mag mag (n) [0.03/0.2] Uncertainty in uvw1mag (stat.error;phot.mag)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)Fuvw1 mJy (n) [8.4/30] De-reddened Swift/UVOT uvw1 band flux density (phot.flux;em.UV)
  (1)e_Fuvw1 mJy (n) [0.04/1.3] Uncertainty in Fuvw1 (stat.error)
  (1)uvm2mag mag (n) [11.2/13.1] De-reddened Swift/UVOT uvm2 band magnitude (phot.mag;em.UV)
  (1)e_uvm2mag mag (n) [0.03/0.2] Uncertainty in uvm2mag (stat.error;phot.mag)
  (1)Fuvm2 mJy (n) [4.4/23.3] De-reddened Swift/UVOT uvm2 band flux density (phot.flux;em.UV)
  (1)e_Fuvm2 mJy (n) [0.09/0.5] Uncertainty in Fuvm2 (stat.error)
  (1)uvw2mag mag (n) [11/12.5] De-reddened Swift/UVOT uvw2 band magnitude (phot.mag;em.UV)
  (1)e_uvw2mag mag (n) [0.03/0.4] Uncertainty in uvw2mag (stat.error;phot.mag)
  (1)Fuvw2 mJy (n) [7.6/26.3] De-reddened Swift/UVOT uvw2 band flux density (phot.flux;em.UV)
  (1)e_Fuvw2 mJy (n) [0.18/0.9] Uncertainty in Fuvw2 (stat.error)
  (1+4+5)All (char) Display observation data and results of this obsID (link to Tables 2, 6 and 10) (meta.ref.url)
  (2)obsID (char) Observation identifier(s) (Note 1)   (meta.id;obs.param;obs)
  (2+3)dt h [0.1/24] Total length of the particular observation (Note 2)   (time.interval)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2+3+4+5)chi2  (n) [2.4/18089] Reduced χ2 parameter (stat.param)
  (2+3+4+5)dof  (n) [1/18] Fit degrees of freedom (stat.fit.dof;stat.fit.param;meta.modelled)
  (2)Bin (char) Orbit segment (obs.param)
  (2+3)Fvar % (n) [1.5/57.2] Fractional variability amplitude (phot.mag;arith.ratio)
  (2+3)e_Fvar % (n) [0.2/4] Uncertainty in Fvar (stat.error)
  (2)a-min  (n) [1.6/3] Min log-parabolic parameter, a (stat.param)
  (2)e_a-min  (n) [0.01/0.04] Uncertainty in a-min (stat.error)
  (2)a-max  (n) [1.7/2.9] Max log-parabolic parameter, a (stat.param)
  (2)e_a-max  (n) [0.01/0.04] Uncertainty in a-max (stat.error)
  (2)alpha-min  (n) [1.0/3] Min power-law parameter, alpha (stat.param)
  (2)e_alpha-min  (n) [0.01/0.03] Uncertainty in alpha-min (stat.error)
  (2)alpha-max  (n) [1.8/2.4] Max power-law parameter, alpha (stat.param)
  (2)e_alpha-max  (n) [0.01/0.08] Uncertainty in alpha-max (stat.error)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)b-min  (n) [0.07/0.4] Min curvature parameter (stat.param)
  (2)e_b-min  (n) [0.04/0.09] Uncertainty in b-min (stat.error)
  (2)b-max  (n) [0.09/0.5] Max curvature parameter (stat.param)
  (2)e_b-max  (n) [0.03/0.2] Uncertainty in b-max (stat.error)
  (2)Ep-min keV (n) [0.002/6.5] Min position of the SED peak (stat.param)
  (2)e_Ep-min keV (n) [0.001/2] Uncertainty in Ep-min (stat.error)
  (2)Ep-max keV (n) [0.02/14.7] Max position of the SED peak (stat.param)
  (2)e_Ep-max keV (n) [0.01/1.7] Uncertainty in Ep-max (stat.error)
  (2)HR-min  (n) [0.1/1.1] Minimum hardness ratio (phot.flux;stat.min)
  (2)e_HR-min  (n) [0.01/0.03] Uncertainty in HR-min (stat.error)
  (2)HR-max  (n) [0.1/1.3] Maximum hardness ratio (phot.flux;stat.max)
  (2)e_HR-max  (n) [0.01/0.05] Uncertainty in HR-max (stat.error)
  (2)Remarks (char) Remarks (Note 3)   (meta.note)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (3)MJDst (char) d MJD start date of observation (time.epoch)
  (3)MJDEnd (char) d MJD end date of observation (time.epoch)
  (3)Band (char) Filter or energy range (instr.bandpass)
  (4+5)ORS (char) Orbit/Segment code for model fit (Note 1)   (obs.param)
  (4)a   [1.6/3] Model parameter, photon index at the energy E1 (meta.code;stat.param;meta.modelled)
  (4)e_a   [0.01/0.06] Uncertainty in a (stat.error)
  (4)b   [0.07/0.5] Model parameter, curvature parameter (stat.param;meta.modelled)
  (4)e_b   [0.03/0.3] Uncertainty in b (stat.error)
  (4)Ep keV [0.002/14.7] Model parameter, position of the SED peak (stat.param)
  (4)e_Ep keV [0.001/1.7] Uncertainty in Ep (stat.error)
  (4)10K   [0.3/9.4] Model parameter, normalization factor, x10 (stat.param)
  (4)e_10K   [0.01/0.2] Uncertainty in K (stat.error)
  (4+5)logFS [mW/m2] [12.9/269] Log unabsorbed 0.3-2keV flux (phot.flux;em.X-ray.soft)

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  (4+5)e_logFS [mW/m2] [0.2/3.8] Uncertainty in logFS (stat.error)
  (4+5)logFH [mW/m2] [2.3/291] Log unabsorbed 2-10keV flux (phot.flux;em.X-ray.hard)
  (4+5)e_logFH [mW/m2] [0.09/8] Uncertainty in logFH (stat.error)
  (4+5)logFT [mW/m2] [15.4/536] Log unabsorbed 0.3-10keV flux (phot.flux;em.X-ray)
  (4+5)e_logFT [mW/m2] [0.3/8.6] Uncertainty in logFH (stat.error)
  (4+5)HR   [0.1/1.3] Hardness ratio (Note 2)   (phot.flux;arith.ratio)
  (4+5)e_HR   [0.01/0.05] Uncertainty in HR (stat.error)
  (5)Gamma   [1.7/3] Photon index in PL model (meta.code;spect.index;meta.modelled)
  (5)e_Gamma   [0.01/0.05] Uncertainty in Gamma (stat.error)
  (5)K   [0.4/10] Normalization (stat.param)
  (5)e_K   [0.01/0.09] Uncertainty in K (stat.error)

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