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1990A&AS...82...41Kulkarni+
J/A+AS/82/41        Spectral index for B3 radio sources (Kulkarni+ 1990)
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Spectral index distribution for a sample of sources from the B3 catalogue.
       Kulkarni V.K., Mantovani F., Pauliny-Toth I.I.K.
      
      =1990A&AS...82...41K      (SIMBAD/NED BibCode)
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ADC_Keywords: Radio sources
Keywords: radio sources - radio continuum

Abstract:
    Flux density measurements at 4730MHz are presented for a sample of 770
    radio sources from the B3 catalogue with density S408>0.35Jy. For 429
    of these sources flux density measurements at 1410MHz are also
    presented. The radio spectral indices derived are used to investigate
    the dependence of median spectral index on flux density

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table1             70      770   List of the observed sources, their flux
                                  densities and spectral indices
table3             44       22   The median spectral index {alpha}_med_ values
                                  for different samples.
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See also:
    VIII/37 : The Third Bologna Survey (B3) (Ficarra+ 1985)

Byte-by-byte Description of file: table1
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   Bytes Format Units   Label     Explanations
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   1-  8  A8    ---     B3        B3 name
  10- 11  I2    h       RAh       Right ascension (1950)
  13- 14  I2    min     RAm       Right ascension (1950)
  16- 20  F5.2  s       RAs       Right ascension (1950)
  22- 23  I2    deg     DEd       Declination (1950)
  25- 26  I2    arcmin  DEm       Declination (1950)
  28- 31  F4.1  arcsec  DEs       Declination (1950)
  33- 37  F5.2  Jy      S408MHz   Flux density at 408MHz
  39- 42  I4    mJy     S1410MHz  ? Flux density at 1410MHz
  43- 44  A2    ---   n_S1410MHz  [*abcn ] Note on S1410MHz (1)
  46- 49  I4    mJy     S4750MHz  ? Flux density at 4750MHz
      50  A1    ---   n_S4750MHz  [*abcn] Note on S4750MHz (1)
  51- 56  F6.3  ---     SI1       ? Spectral index between 408MHz and 4750MHz
  58- 63  F6.3  ---     SI2       ? Spectral index between 408MHz and 1410MHz
  65- 70  F6.3  ---     SI3       ? Spectral index between 1410MHz and 4750MHz
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Note (1): *: integrated flux density
          a: flux density derived from scans available in one direction only
          b: flux density derived from Kuhr et al. (1981AJ.....86..854K)
          c: caution
          n: not detected
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Byte-by-byte Description of file: table3
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   Bytes Format Units  Label   Explanations
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   1-  7  A7    ---    Sample  Sample name
   9- 14  F6.3  Jy     Smed    Median density flux at 408MHz
  16- 20  F5.3  ---    SImed   Median spectral index or lower limit if n_SImed=l
      21  A1    ---  n_SImed   [l] l: SImed is a lower limit
  23- 27  F5.3  ---  e_SImed   ? rms uncertainty on SImed
  29- 33  F5.3  ---    SImefu  ? Upper limit for median spectral index
  36- 38  I3    ---    Nsource Number of sources
  40- 41  A2    ---    Points  Point in fig.1
  43- 44  A2    ---    Ref     Refences (1)
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Note (1): kk: Kapahi and Kulkarni, (1986A&A...165...39K)
          km: Kulkarni and Mantovani, (1985A&AS...61....1K)
          pp: present paper
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Table 2: Sample definitions of the sources observed
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 Sample  Flux Density Range   Declination Range      Number
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   1      2.53 < S            37deg 15' - 47deg 37'    81
   2      1.60 < S < 2.53     37deg 15' - 47deg 37'    85
   3      1.01 < S < 1.60     38deg 00' - 44deg 30'   111
   4      0.80 < S < 1.01     38deg 00' - 44deg 30'    97
   5      0.51 < S < 0.80     38deg 00' - 40deg 48'   126
   6      0.40 < S < 0.51     38deg 00' - 40deg 48'   128
   7      0.35 < S < 0.40     38deg 50' - 40deg 00'    39
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History: Prepared via OCR at CDS.
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(End)                          James Marcout, Patricia Bauer [CDS]  16-May-1997