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J/A+AS/108/79
 Ultra-steep spectrum radiosources (Roettgering+, 1994)
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1.J/A+AS/108/79/sourceSource list (1168 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)
  Samples (char) Name of the samples to which the source belongs (Note 1)   (meta.id;meta.dataset)
  Name (char) Source name in IAU B1950.0 format (meta.id;meta.main)
  m_Name (char) [1-5ABc ] Component designator (Note 2)   (meta.code.multip)
  RAJ2000 "h:m:s" []? Right ascension J2000 (pos.eq.ra;meta.main)
  DEJ2000 "d:m:s" (n)Declination sign (pos.eq.dec;meta.main)
  Speak mJy Peak brightness (phot.flux.density;em.radio.20-100MHz)
  Sint mJy []? Integrated flux density (phot.flux.density;em.radio.750-1500MHz)
  R   []? Ratio of the integrated VLA flux density to the flux density obtained from the NRAO Green Bank 1400 MHz (phot.flux;arith.ratio)
  alpha(l)   []? Low frequency spectral index (spect.index)
  e_alpha(l)   []? Rms uncertainty on alpha(l) (stat.error)
  alpha(h)   []? High frequency spectral index (spect.index)
  e_alpha(h)   []? Rms uncertainty on alpha(h) (stat.error)
  Cat (char) [a-r ] Radio catalogues that have been used in the spectral index calculations (Note 3)   (meta.note)
  n_Cat (char) Notes on catalogues (Note 4)   (meta.note)
  Mul (char) [DPMTF ] D = double, P = point source, T = triple DF = diffuse, M = complex (meta.code.multip)
  l_Size (char) Limit flag on Size (meta.code.error)
  Size arcsec []? Angular size measured from VLA maps (phys.angSize;src)
  PA deg []? Position angle measured from VLA maps (pos.posAng)

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