VizieR

CfA VizieR . ADAC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR .
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VizieR

Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:
 Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
J/ApJS/247/16
  Extreme high-frequency-peaked BL Lac objects (Acciari+, 2020)
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2020ApJS..247...16A
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spectrum
Post annotation 		img(gal)
1.J/ApJS/247/16/magicSample 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)

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)
  Nx  (n)Number of Swift-XRT measurements for this source (link to Table 7) (meta.number)
  Name (char) (i) Target name (meta.id;meta.main)
  f_Name (char) [f] f: reference source (Note 1)   (meta.code)
  RAJ2000 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
  DEJ2000 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
  GLON deg [67.7/249.3] Galactic longitude (pos.galactic.lon)
  GLAT deg [-42/65] Galactic latitude (pos.galactic.lat)
  z   [0.049/0.3] Redshift (src.redshift)
  r_z (char) [a-e] Redshift reference (Note 2)   (meta.ref;pos.frame)
  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
  lognuPk Hz (n) [16.6/18.5] Synchrotron peak frequency reported by Chang+ (2017, J/A+A/598/A17) (em.freq)
  Sel (char) Selection criteria (Note 3)   (meta.code)
  Date (char) yr Year(s) of observation (time.epoch)
  Exp h [5.9/117.5] Effective exposure time after quality cuts (meta.code.qual;time.duration;obs.exposure)
  Sigma   [-0.9/9] Significance of the signal in σ (stat.fit.goodness)
  Eth GeV [150/300] Assumed energy threshold for integral flux calculation (instr.sensitivity)
  l_Flux (char) Limit flag on Flux (Note 4)   (meta.code.error;phot.flux)
  Flux 10-12cm-2/s [1.5/9.3] Flux measured above the energy threshold (phot.flux.density;em.gamma.hard)
  e_Flux 10-12cm-2/s(n) [0.3/1.1] Flux uncertainty (stat.error;phot.flux)
  f_Flux (char) [gh] Flag on Flux (Note 5)   (meta.code)
  l_Lum (char) Limit flag on Lum (Note 4)   (meta.code.error)
  Lum 10+36W [0.6/68.5] VHE gamma-ray luminosity over 200GeV; in 1043erg/s units (phys.luminosity;em.gamma)
  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
  VHE? (char) [YNH] Source detection status at very high-energy (E>100GeV) gamma-rays (Note 6)   (meta.code)
  n_Name (char) [c] Note on Name (Note 7)   (meta.note)
  MJDSt d [55641/57775] Start date of observation (time.epoch)
  MJDEnd d [55649/58055] End date of observation (time.epoch)
  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)
  e_F2-10keV 10-15W/m2 [0.03/1.2] F2-10keV uncertainty (stat.error)
  Gamma   [1.4/2.2] Spectral index (spect.index)
  e_Gamma   [0.02/0.2] Gamma uncertainty (stat.error)
  beta  (n) [0.2/0.6] Curvature parameter of the log-parabola model (stat.param;meta.modelled)
  e_beta  (n) [0.04/0.2] beta uncertainty (stat.error)
  chi2   [30.5/398] χ2 fit (stat.fit.param;meta.modelled)
  dof   [32/377] Degree of freedom (stat.fit.dof)
  GamEq  (n) [1.9/2.4] Equivalent spectral index when the log parabola is the best-fit model (spect.index)
  e_GamEq  (n) [0.05/0.3] GamEq uncertainty (stat.error)
  SED  SED interactive plot (meta.ref.url)
spectrum
  SimbadName (char) Designation understandable by the Simbad data-base (meta.id)
  NED  ask the NED data-base about this object (meta.ref.url)

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