J/AZh/74/812 102MHz radio source survey (Tyul'bashev 1997)
Analysis of compact radio sources using 102 MHz interplanetary
scintillation observations
Tyul'bashev S.A.
<Astron. Zh., 74, 812 (1997)>
=1997AZh....74..812T 1997AZh....74..812T (SIMBAD/NED BibCode)
=1997ARep...41..723T 1997ARep...41..723T
ADC_Keywords: Radio sources ; Radio lines
Abstract:
An analysis of 125 radio sources from a 102MHz survey of scintillating
sources is presented. These compact (<1") radio sources are identified
with radio sources in the most sensitive catalogs currently available.
Analysis of the integrated spectra for these objects indicates that
the compact sources have steep spectra (α>0.5). There is a
tendency for weaker sources to be more compact. The inferred spectral
indices for compact sources in the cores of extended objects are on
average lower than the integrated values. The most likely candidates
for optical counterparts to the compact radio sources from the
scintillating source survey are steep-spectrum quasars.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 63 125 Source flux densities, spectral indices,
and compactnesses
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Source name (based on 1950 position) (1)
10- 13 F4.2 Jy rms rms fluctuation for the scintillating source
flux density at 102MHz (1)
15- 18 F4.2 Jy S102MHz Flux density at 102MHz (1)
20- 25 F6.3 Jy S151MHz ? Integrated flux density at 151MHz (2)
27- 32 F6.3 Jy S365MHz ? Integrated flux density at 365MHz (3)
34- 38 F5.3 Jy S408MHz ? Integrated flux density at 408MHz (4)
40- 44 F5.3 Jy S1400MHz ? Integrated flux density at 1400MHz (5)
46- 50 F5.3 Jy S4885MHz ? Integrated flux density at 4885MHz (6)
52- 55 F4.2 --- SI ? Spectral index for the integrated spectra
57 A1 --- l_R Limit flag on R
58- 61 F4.2 --- R ? Compactness of the source (7)
63 A1 --- u_R [?] Uncertainty flag on R
--------------------------------------------------------------------------------
Note (1): Data form Artyukh et al., 1996, Cat. VIII/67
Note (2): Fluxes from Ryle & Clarce (1961MNRAS.122..349R 1961MNRAS.122..349R)
Note (3): Fluxes form Longair (1966MNRAS.133..421L 1966MNRAS.133..421L)
Note (4): Fluxes from Bennett (1963MmRAS..68..163B 1963MmRAS..68..163B)
Note (5): Fluxes from Windhorst et al. (1984A&AS..58....1W)
Note (6): Fluxes from Windhorst et al. (1984A&AS..58...39W)
Note (7): Ratio of the flux density of the scintillating component to the
integrated flux density of the source.
--------------------------------------------------------------------------------
History: Prepared via OCR at CDS.
* 01-Mar-1999: three errors were detected in the English version
(1997ARep...41..723T 1997ARep...41..723T) by H. Andernach:
-> 1 source (0612+396) is missing
-> missing l_R flag for 0636+397
-> bad name (1649+485) for 0649+485
References:
Artyuh & Tyul'bashev, 1996ARep...40..601A 1996ARep...40..601A (1996AZh....73..661A 1996AZh....73..661A)
(End) James Marcout, Patricia Bauer [CDS] 13-Nov-1998