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J/ApJ/559/864
 Extragalactic ultracompact H II regions (Johnson+, 2001)
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img(gal)
1.J/ApJ/559/864/ngc6946Ultra-dense HII candidates in NGC 6946 (adopted distance: 5.1Mpc) (16 rows)

 
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)
  [JKM2001]  Source identification (NGC 6946 NN) (meta.id;meta.main)
  RAJ2000 "h:m:s" Right ascension (J2000) (Note 1)   (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" Declination (J2000) (Note 1)   (pos.eq.dec;meta.main)
  L6cm 10+17W/Hz6cm luminosity (phys.luminosity;em.radio)
  e_L6cm 10+17W/Hzrms uncertainty on L6cm (stat.error)
  n_L6cm (char) [*] Note on L6cm (Note 2)   (meta.note)
  L20cm 10+17W/Hz20cm luminosity (phys.luminosity;em.radio)
  e_L20cm 10+17W/Hzrms uncertainty on L20cm (stat.error)
  n_L20cm (char) [*] Note on L20cm (Note 2)   (meta.note)
  QLyc 10+49s-1 Production rate of Lyman continuum photon (phot.count;em.UV)
  e_QLyc 10+49s-1 rms uncertainty on QLyc (stat.error)
  SI  Spectral index 20cm to 6cm (spect.index;em.radio.750-1500MHz)
  e_SI  rms uncertainty on SI (stat.error)
  R (char) R-band counterpart ? (meta.note)
  Halpha (char) Hα counterpart ? (meta.note)
  [LDG97]  Lacey et al. (1997ApJS..109..417) number (meta.id)

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