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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