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J/ApJ/999/244
  X-ray catalog and classification of 4FGL-DR4 UGSs (Neumann+ 2026)
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2026ApJ...999..244N
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1.J/ApJ/999/244/table4Parameters for X-Ray sources detected with Swift-XRT within 4FGL-DR4 unassociated source uncertainty ellipses (70 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)
  4FGL (char) Target AFGL identifier, JHHMM.m+DDMM (Note 1)   (meta.id;meta.main)
  logFG [mW/m2] (n) log {gamma}-ray 0.1-100GeV flux (erg/s/cm2) (phot.flux.density;em.gamma.hard)
  PLIndex  (n) gamma-ray photon index when fitting with PowerLaw (stat.fit.param)
  logVIndex [-] (n) Year-to-year {gamma}-ray variability (src.var.index)
  logPLECSigC [-] (n) Curvature significance of PLEC model (stat.fit.param)
  SwXF4-DR4 (char) XRT designation, JHHMMSS.s+DDMMSS, SwXF4-DR4 (meta.id)
  SwUVF4-DR4 (char) UVOT designation, JHHMMSS.s+DDMMSS, SwUVF4-DR4 (meta.id)
  S/N  XRT signal-to-noise ratio (stat.snr)
  logFX [mW/m2] Unabsorbed log X-ray 0.3-10keV flux (erg/s/cm2) (Note 2)   (phot.flux;em.X-ray)
  alphaX  X-ray photon index (Note 2)   (stat.fit.param)
  Filter (char) UVOT filter used to calculate Vmag (instr.setup;instr.filter)
  l_Vmag (char) Limit flag on V-band (meta.code.error)
  Vmag mag (n) V-band magnitude calculated with UVOT filter (Note 3)   (phot.mag;em.opt.V)
  SwXF4-DR4K (char) SwXF4-DR4 identifier, JHHMMSS.s+DDMMSS, Kerby et al. (2021ApJ...923...75K, Cat. J/ApJ/923/75K) (Note 4)   (meta.id)

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