J/MNRAS/485/88 Southern compact extragalactic radio sources (Petrov+, 2019)
The Second LBA Calibrator Survey of southern compact extragalactic radio
sources - LCS2.
Petrov L., de Witt A., Sadler E.M., Phillips C., Horiuchi S.
<Mon. Not. R. Astron. Soc., 485, 88-101 (2019)>
=2019MNRAS.485...88P 2019MNRAS.485...88P (SIMBAD/NED BibCode)
ADC_Keywords: Interferometry ; Surveys ; Radio sources ; Positional data
Keywords: instrumentation: interferometers - catalogues - surveys - astrometry
Abstract:
We present the second catalogue of accurate positions and correlated
flux densities for 1100 compact extragalactic radio sources that were
not observed before 2008 at high angular resolution. The catalogue
spans the declination range [-90°,-30°] and was constructed
from 19 24-h VLBI observing sessions with the Australian Long Baseline
Array at 8.3GHz. The catalogue presents the final part of the program
that was started in 2008. The goals of that campaign were (1) to
extend the number of compact radio sources with precise coordinates
and measure their correlated flux densities, which can be used for
phase referencing very long baseline interferometry (VLBI) and Atacama
Large Millimeter/submillimeter Array (ALMA) observations, geodetic
VLBI, search for sources with significant offsets with respect to Gaia
positions, and space navigation; (2) to extend the complete
flux-limited sample of compact extragalactic sources to the Southern
hemisphere; and (3) to investigate the parsec-scale properties of
sources from the high-frequency AT20G survey. The median uncertainty
of the source positions is 3.5mas. As a result of this VLBI campaign,
the number of compact radio sources south of declination -40° that
have measured VLBI-correlated flux densities and positions known to
milliarcsecond accuracy has increased by over a factor of 6.
Description:
The LCS VLBI observing program has provided positions of 1100 compact
radio sources at declinations below -30° with accuracies at an mas
level and estimates of flux density at 8.3GHz.
The observing network includes 11 stations (ASKAP, ATCA, CEDUNA,
HARTRAO, HOBART26, KATH12M, MOPRA, PARKES, TIDBINBILLA, YARRA12M,
WARK12M), although only a sub-set of stations participated at any
given observing session.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 43 117 Results of estimated source flux density and
the FWHM of the Gaussian fit
table4.dat 118 1100 The LCS position catalog
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object name (LCS JHHMM-DDMM)
16- 23 A8 --- IVS IVS source name
25- 29 F5.3 Jy Flux The correlated flux density at 8.3GHz
31- 35 F5.2 mas FWHM The full width half maximum (FWHM) of the
Gaussian fit
37- 43 F7.4 mas e_FWHM ?=-1.0 Error on FWHM
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object name (LCS JHHMM-DDMM)
16- 23 A8 --- IVS IVS source name
25- 26 I2 h RAh Right ascension (J2000)
28- 29 I2 min RAm Right ascension (J2000)
31- 38 F8.5 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 53 F7.4 arcsec DEs Declination (J2000)
55- 59 F5.1 mas e_RAs Uncertainty in right ascension without
cos(δ) factor
61- 65 F5.1 mas e_DEs Uncertainty in declination
67- 72 F6.3 --- Corr Correlation between right ascension and
declination
74- 76 I3 --- Nobs Number of used observations
78- 83 F6.3 Jy Flux1 ?=-1.0 Median correlated flux density at
baseline projection lengths in a range
[0,10] millions wavelengths
85- 90 F6.3 Jy Flux2 ?=-1.0 Median correlated flux density at
baseline projection lengths in a range
[10,40] millions wavelengths
92- 97 F6.3 Jy Flux3 ?=-1.0 Median correlated flux density at
baseline projection lengths in a range
[40,300] millions wavelengths
99-104 F6.3 Jy e_Flux1 ?=-1.0 Error on Flux1
106-111 F6.3 Jy e_Flux2 ?=-1.0 Error on Flux2
113-118 F6.3 Jy e_Flux3 ?=-1.0 Error on Flux3
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 07-Sep-2022