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/ApJ/559/864
  Extragalactic ultracompact H II regions (Johnson+, 2001)
ReadMe+ftp
2001ApJ...559..864J
Similar Catalogs
Post annotation 		img(gal)
1.J/ApJ/559/864/ngc6946(c)Ultra-dense HII candidates in NGC 6946 (adopted distance: 5.1Mpc) (16 rows)
2.J/ApJ/559/864/m33(c)Ultra-dense HII candidates in M33 (adopted distance: 840kpc) (14 rows)
3.J/ApJ/559/864/ngc0253(c)Ultra-dense HII candidates in NGC 253 (adopted distance: 2.5Mpc) (5 rows)
Help Xmatch is

Simple ConstraintList Of Constraints
 
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)
   (ALL)[JKM2001]  Source identification (NGC 6946 NN) (meta.id;meta.main)
   (ALL)RAJ2000 "h:m:s" (i) Right ascension (J2000) (Note 1)   (pos.eq.ra;meta.main)
   (ALL)DEJ2000 "d:m:s" (i) Declination (J2000) (Note 1)   (pos.eq.dec;meta.main)
  (1)L6cm 10+17W/Hz6cm luminosity (phys.luminosity;em.radio)
  (1)e_L6cm 10+17W/Hzrms uncertainty on L6cm (stat.error)
  (1)n_L6cm (char) [*] Note on L6cm (Note 2)   (meta.note)
  (1)L20cm 10+17W/Hz20cm luminosity (phys.luminosity;em.radio)
  (1)e_L20cm 10+17W/Hzrms uncertainty on L20cm (stat.error)
  (1)n_L20cm (char) [*] Note on L20cm (Note 2)   (meta.note)
   (ALL)QLyc 10+49s-1 Production rate of Lyman continuum photon (phot.count;em.UV)

ALL cols		    
 (i)indexed column
   (ALL)e_QLyc 10+49s-1 rms uncertainty on QLyc (stat.error)
   (ALL)SI  Spectral index 20cm to 6cm (spect.index;em.radio.750-1500MHz)
   (ALL)e_SI  rms uncertainty on SI (stat.error)
  (1)R (char) R-band counterpart ? (meta.note)
  (1+3)Halpha (char) Hα counterpart ? (meta.note)
  (1)[LDG97]  Lacey et al. (1997ApJS..109..417) number (meta.id)
  (2)L6cm 10+16W/Hz6cm luminosity (phys.luminosity;em.radio)
  (2)e_L6cm 10+16W/Hzrms uncertainty on L6cm (stat.error)
  (2)L20cm 10+16W/Hz20cm luminosity (phys.luminosity;em.radio)
  (2)e_L20cm 10+16W/Hzrms uncertainty on L20cm (stat.error)
  (2)B (char) B-band counterpart ? (meta.note)
  (2)HII (char) HII counterpart ? (Note 1)   (meta.note)
  (2)[GDK99]  Gordon et al. (1999, Cat. J/ApJS/120/247 number (meta.id)

ALL cols		    
 (i)indexed column
  (3)L1.3cm 10+17W/Hz1.3cm luminosity (phys.luminosity;em.radio)
  (3)e_L1.3cm 10+17W/Hzrms uncertainty on L1.3cm (stat.error)
  (3)L2cm 10+17W/Hz(n) 2cm luminosity (phys.luminosity;em.radio)
  (3)e_L2cm 10+17W/Hz(n) rms uncertainty on L2cm (stat.error)
  (3)L3.6cm 10+17W/Hz3.6cm luminosity (phys.luminosity;em.radio)
  (3)e_L3.6cm 10+17W/Hzrms uncertainty on L3.6cm (stat.error)
  (3)I (char) I-band counterpart ? (meta.note)
  (3)[AU88] (char) Ulvestad & Antonucci (1997ApJ...488..621U) number (meta.id)

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