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Target Name (resolved by Sesame) or Position:
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NB: The epoch used for the query is the original epoch of the table(s)Radius Box size

  
VII/181
  X-ray of active galaxies and nuclei (Della Ceca+, 1990)
ReadMe+ftp
1990ApJS...72..471D
Similar Catalogs
Post annotation 		img(gal)
1.VII/181/table2Catalog for PG Quasars (473 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. ((unassigned))
  RA1950 "h:m:s" Right ascension 1950 ((unassigned);(unassigned))
  DE1950 "d:m:s" (n)Declination sign ((unassigned);(unassigned))
  Name (char) PG name (Schmidt and Green 1983). For other names see table6 ((unassigned);(unassigned))
  z   []? Redshift (Schmidt and Green 1986) ((unassigned))
  Bmag mag []? B magnitudes (Schmidt and Green 1983) ((unassigned);(unassigned))
  Instr (char) Instrument or experiment by which the measurement was taken. (Note 1)   ((unassigned);(unassigned))
  E1 keV []? Lowest value of the spectral window (3) (Note 3)   ((unassigned);(unassigned))
  n_E1 (char) A '-' indicates the spectral window ((unassigned))
  E2 keV []? Highest value of the spectral window (E1_E2) when n_E = '-' (3) (Note 3)   ((unassigned);(unassigned))
  n_Flux (char) [*] Note (MED1.05 for flux MKN 421, A5SSI) ((unassigned))

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
  l_Flux (char) [~<] Limit flag on flux ((unassigned))
  Flux   []? Flux measured in the energy band E1-E2 or monochromatic at a given energy, according to column E1-E2 ((unassigned);(unassigned))
  Flux2   []? Higest value of flux interval when n_Flux = '-' ((unassigned);(unassigned))
  u_Flux (char) [)] Uncertainty flag on flux interval ((unassigned))
  e_Flux   []? Rms uncertainty on Flux ((unassigned))
  u_e_Flux (char) [)] Uncertainty flag on e_flux ((unassigned))
  x_Flux (char) Units in which the quantities reported in the two previous columns are measured. (Note 2)   ((unassigned))
  l_Flux0 (char) [~<] Limit flag on Flux0 ((unassigned))
  Flux0 mW/m2 []? Flux from reference in column ref. If the flux in column E1 is monochromatic the physical units here will be mW/m2/Hz ((unassigned);(unassigned))
  n_Flux0 (char) A '-' indicates an interval of flux ((unassigned))
  Flux02   []? Highest value of flux interval when n_Flux0= '-' ((unassigned);(unassigned))
  u_Flux0 (char) [)] Uncertainty flag on flux interval ((unassigned))
  e_Flux0 mW/m2 []? Rms uncertainty on Flux0 or upper limit of error on Flux0 if neFlux0='-' (in units of Flux0) ((unassigned))
  n_e_Flux0 (char) [-] A '-' indicates an interval uncertainty on Flux0 ((unassigned))
  e(Flux0)l mW/m2 []? Error on Flux0 (lower limit) ((unassigned))
  ref. (char) Number codes to references, explained in file "ref.num" (Note 4)   ((unassigned))
  A-2   []? A-2 flux measured in R15 counts ((unassigned);(unassigned))
  n_A-2 (char) The flags "c" and "L" indicate contamination from a nearby bright X-ray source and low galactic latitude (|b|<20 deg), respectively. ((unassigned))
  e_A-2   []? Rms uncertainty on A-2 ((unassigned))
  ObsTime d []? Average observation time (in days of the year 1977) during the first six-month all-sky survey completed by the HEAO-1 spacecraft ((unassigned))

ALL cols		    
(n) indicates a possible blank or NULL column(i)indexed column
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The following problems were encountered in this VizieR run:
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If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR1011086.err (2026-01-14T07:49:16)
-2
-source=VII/181/table2
-ref=VIZ69674a7cf6d8e
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