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J/ApJS/247/16
  Extreme high-frequency-peaked BL Lac objects (Acciari+, 2020)
spectrum
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img(gal)
1.J/ApJS/247/16/magic(c)Sample of extreme high-frequency-peaked BL Lac objects (EHBLs) observed with the MAGIC telescopes (Table 1), results (Table 2) and main spectral parameters resulting from combining all Swift-XRT pointings during the MAGIC observation window (Table 8) (13 rows)
2.J/ApJS/247/16/fermiMain spectral parameters resulting from the analysis of Swift-XRT and Fermi-LAT data (Table 4) and parameters from the 3FGL, 2FHL, and 3FHL catalogs (Table 6) (11 rows)
3.J/ApJS/247/16/table7The Swift-XRT results for the 11 sources (319 rows)
4.J/ApJS/247/16/fig1Spectral energy distributions (Data behind Figure 1) (36 rows)
5.J/ApJS/247/16/sedsBroadband SED and modeled spectra (data behind Figures 3, 4 and 10) (286 rows)

 
Query by Constraints constraints help applied on Columns (Output Order: + - )
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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)Nx  (n)Number of Swift-XRT measurements for this source (link to Table 7) (meta.number)
   (ALL)Name (char) (i) Target name (meta.id;meta.main)
  (1)f_Name (char) [f] f: reference source (Note 1)   (meta.code)
  (1)RAJ2000 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
  (1)DEJ2000 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
  (1)GLON deg [67.7/249.3] Galactic longitude (pos.galactic.lon)
  (1)GLAT deg [-42/65] Galactic latitude (pos.galactic.lat)
  (1)z   [0.049/0.3] Redshift (src.redshift)
  (1)r_z (char) [a-e] Redshift reference (Note 2)   (meta.ref;pos.frame)
  (1)NH 10+21cm-2 [0.1/4.4] Equivalent galactic hydrogen column density reported by Kalberla+ (2005, VIII/76) (phys.columnDensity;pos.galactic)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)lognuPk Hz (n) [16.6/18.5] Synchrotron peak frequency reported by Chang+ (2017, J/A+A/598/A17) (em.freq)
  (1)Sel (char) Selection criteria (Note 3)   (meta.code)
  (1)Date (char) yr Year(s) of observation (time.epoch)
  (1)Exp h [5.9/117.5] Effective exposure time after quality cuts (meta.code.qual;time.duration;obs.exposure)
  (1)Sigma   [-0.9/9] Significance of the signal in σ (stat.fit.goodness)
  (1)Eth GeV [150/300] Assumed energy threshold for integral flux calculation (instr.sensitivity)
  (1)l_Flux (char) Limit flag on Flux (Note 4)   (meta.code.error;phot.flux)
  (1)Flux 10-12cm-2/s [1.5/9.3] Flux measured above the energy threshold (phot.flux.density;em.gamma.hard)
  (1)e_Flux 10-12cm-2/s(n) [0.3/1.1] Flux uncertainty (stat.error;phot.flux)
  (1)f_Flux (char) [gh] Flag on Flux (Note 5)   (meta.code)
  (1)l_Lum (char) Limit flag on Lum (Note 4)   (meta.code.error)
  (1)Lum 10+36W [0.6/68.5] VHE gamma-ray luminosity over 200GeV; in 1043erg/s units (phys.luminosity;em.gamma)
  (1)e_Lum 10+36W (n) [0.2/4.8] Lum uncertainty (stat.error)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)VHE? (char) [YNH] Source detection status at very high-energy (E>100GeV) gamma-rays (Note 6)   (meta.code)
  (1+2)n_Name (char) [c] Note on Name (Note 7)   (meta.note)
  (1+2)MJDSt d [55641/57775] Start date of observation (time.epoch)
  (1+2)MJDEnd d [55649/58055] End date of observation (time.epoch)
  (1+2)F2-10keV 10-15W/m2 [1.5/45.5] Swift-XRT 2-10keV X-ray flux during MAGIC observation window (phot.flux;em.X-ray)
  (1+2)e_F2-10keV 10-15W/m2 [0.03/1.2] F2-10keV uncertainty (stat.error)
  (1)Gamma   [1.4/2.2] Spectral index (spect.index)
  (1)e_Gamma   [0.02/0.2] Gamma uncertainty (stat.error)
  (1)beta  (n) [0.2/0.6] Curvature parameter of the log-parabola model (stat.param;meta.modelled)
  (1)e_beta  (n) [0.04/0.2] beta uncertainty (stat.error)
  (1+2)chi2   [30.5/398] χ2 fit (stat.fit.param;meta.modelled)
  (1+2)dof   [32/377] Degree of freedom (stat.fit.dof)
  (1)GamEq  (n) [1.9/2.4] Equivalent spectral index when the log parabola is the best-fit model (spect.index)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (1)e_GamEq  (n) [0.05/0.3] GamEq uncertainty (stat.error)
  (1)SED (char) SED interactive plot (meta.ref.url)
  (1)SimbadName (char) Designation understandable by the Simbad data-base (meta.id)
  (1)NED (char) ask the NED data-base about this object (meta.ref.url)
  (2)MJDx d [55648/57784] Swift-XRT observation date (time.epoch)
  (2)GammaX   [1.63/2.18] Spectral index of X-ray spectrum (spect.index)
  (2)e_GammaX   [0.02/0.2] GammaX uncertainty (stat.error)
  (2)F1-300GeV 10-10cm-2/s(n) [1.4/6.7] Fermi-LAT gamma-ray flux in the range of 1-300GeV (phot.flux.density;em.gamma.hard)
  (2)e_F1-300GeV 10-10cm-2/s(n) [0.6/1.7] Ffermi uncertainty (stat.error)
  (2)GammaR  (n) [1.4/2] Spectral index of the HE gamma-ray spectrum (spect.index)
  (2)e_GammaR  (n) [0.2/0.2] GammaR uncertainty (stat.error)
  (2)TS   [23/94] Likelihood test statistics (TS) of the fitted model (Note 2)   (stat.likelihood)
  (2)F1-100GeV 10-10ph/cm2/s(n) [1.8/6.6] 3FGL gamma-ray flux in 1-100 GeV energy range (phot.flux.density;em.gamma.hard)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (2)e_F1-100GeV 10-10ph/cm2/s(n) [0.1/1] F3FGL uncertainty (stat.error)
  (2)Gam3FGL  (n) [1.4/2.1] Spectral index for the power-law fit in 100MeV-100GeV (spect.index)
  (2)e_Gam3FGL  (n) [0.08/0.3] Gam3FGL uncertainty (stat.error)
  (2)Sig  (n) [5.1/16.7] the detection significance reported by 3FGL (Acero+ 2015, J/ApJS/218/23) (stat.fit.goodness;instr.saturation)
  (2)Gam3FHL  (n) [1.5/2.1] Spectral index for the power-law fit >10GeV reported in 3FHL (Ajello+ 2017, J/ApJS/232/18) (spect.index)
  (2)e_Gam3FHL  (n) [0.1/0.4] Gam3FHL uncertainty (stat.error)
  (2)Gam2FHL  (n) [1.09/3.6] Spectral index for the power-law fit >50GeV reported in 2FHL (Ackermann+ 2016, J/ApJS/222/5) (spect.index)
  (2)e_Gam2FHL  (n) [0.4/1.4] Gam2FHL uncertainty (stat.error)
  (3)MJD d Modified Julian Date of observation (time.epoch)
  (3)obsid  Observation identifier (meta.id;obs.param;obs)
  (3)Exp s [48/6905] Exposure time (time.duration;obs.exposure)
  (3)GammaPL  (n) [1.3/2.4] Spectral index of power law-model (Note 1)   (spect.index)
  (3)e_GammaPL  (n) [0.02/0.3] Uncertainty in GammaPL (stat.error)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (3)chi2PL  (n) [0.3/172] Power law-model χ2 (stat.fit.chi2)
  (3)dofPL  (n) [2/172] Power law-model Degrees of Freedom (stat.fit.dof)
  (3)GammaLP  (n) [1.3/2.1] Spectral index of log-parabola model (Note 1)   (spect.index)
  (3)e_GammaLP  (n) [0.05/0.2] Uncertainty in GammaLP (stat.error)
  (3)betaLP  (n) [0.2/1] Curvature parameter of fitted log-parabola model (stat.param)
  (3)e_betaLP  (n) [0.09/0.3] Uncertainty in betaLP (stat.error)
  (3)chi2LP  (n) [7.5/109] log-parabola model χ2 (stat.fit.chi2)
  (3)dofLP  (n) [18/114] log-parabola model Degrees of Freedom (stat.fit.dof)
  (3)Prob % Null-hypotheses of probability of F-test (Note 2)   (stat)
  (3)F2-10 10-15W/m2 [1.5/85] X-ray 2-10 keV flux density (Note 3)   (phot.flux;em.X-ray)
  (3)e_F2-10 10-15W/m2 [0.1/14] Uncertainty in F2-10 (Note 3)   (stat.error)
  (3)F0.3-10 10-15W/m2 [2.8/140] X-ray 0.3-10 keV flux density (Note 3)   (phot.flux;em.X-ray)
  (3)e_F0.3-10 10-15W/m2 [0.1/13] Uncertainty in F0.3-10 (Note 3)   (stat.error)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (4)Energy GeV [144.7/3774] Energy (em.energy)
  (4)e_Energy GeV (n) [31.5/1210] Lower Energy bin width (stat.error;phys.energy)
  (4)E_Energy GeV (n) [41/2489] Upper Energy bin width (stat.error;stat.max)
  (4)dN/dE 1/TeV/cm2/s [2.4e-14/7.5e-11] Differential photon flux at Energy (phot.flux;arith.ratio)
  (4)e_dN/dE 1/TeV/cm2/sLower uncertainty in dN/dE (stat.error)
  (4)E_dN/dE 1/TeV/cm2/sUpper uncertainty in dN/dE (stat.error;stat.max)
  (4+5)Start d [56035/57658] Modified Julian start date of observation (time.start;obs)
  (4+5)End d [56066/58056] Modified Julian end date of observation (time.end;obs)
  (4)Texp h [8.7/52.5] Exposure time (time.duration;obs.exposure)
  (4+5)Comm (char) Comment (Note 1)   (meta.note)
  (5)Fig (char) Figure number in the paper –in Figure 4: the four sources with no MAGIC detection or hints (but Fermi-LAT detection); in Figure 10: data for RBS 0921 (meta.bib.fig)
  (5)Freq Hz [4.86e+14/9.13e+26] Frequency (em.freq)
  (5)e_Freq Hz (n) Lower 1σ uncertainty limit in Freq (stat.error)

ALL cols
    
(n) indicates a possible blank or NULL column(i)indexed column
  (5)E_Freq Hz (n) Upper 1σ uncertainty limit in Freq (stat.error;stat.max)
  (5)l_nufnu (char) Upper limit flag on nufnu (meta.code.error)
  (5)nufnu mW/m2 [3.14e-13/2.66e-11] Differential photon flux at Freq; in units of erg/s/cm2 (phot.flux.density;em.radio)
  (5)e_nufnu mW/m2 (n) Lower 1σ uncertainty limit in nufnu (stat.error)
  (5)E_nufnu mW/m2 (n) Upper 1σ uncertainty limit in nufnu (stat.error;stat.max)
  (5)Texp s (n) [1506/423000] Exposure time (time.duration;obs.exposure)

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