J/ApJS/228/22 Korean VLBI Network Calibrator Survey (KVNCS). I. (Lee+, 2017)
Korean VLBI Network Calibrator Survey (KVNCS).
I. Source catalog of KVN single-dish flux density measurement in the K and
Q bands.
Lee J.A., Sohn B.W., Jung T., Byun D.-Y., Lee J.W.
<Astrophys. J. Suppl. Ser., 228, 22-22 (2017)>
=2017ApJS..228...22L 2017ApJS..228...22L (SIMBAD/NED BibCode)
ADC_Keywords: Radio continuum ; Redshifts ; Surveys ; Active gal. nuclei
Keywords: catalogs; quasars: general; radio continuum: galaxies; surveys
Abstract:
We present the catalog of the KVN Calibrator Survey (KVNCS). This
first part of the KVNCS is a single-dish radio survey simultaneously
conducted at 22 (K band) and 43GHz (Q band) using the Korean VLBI
Network (KVN) from 2009 to 2011. A total of 2045 sources are selected
from the VLBA Calibrator Survey with an extrapolated flux density
limit of 100mJy at the K band. The KVNCS contains 1533 sources in the
K band with a flux density limit of 70mJy and 553 sources in the Q
band with a flux density limit of 120mJy; it covers the whole sky down
to -32.5° in decl. We detected 513 sources simultaneously in the K
and Q bands; ∼76% of them are flat-spectrum sources (-0.5≤α≤0.5).
From the flux-flux relationship, we anticipated that most of the
radiation of many of the sources comes from the compact components.
The sources listed in the KVNCS therefore are strong candidates for
high-frequency VLBI calibrators.
Description:
We selected 2503 sources based on lower frequency VLBI flux density
from the Very Long Baseline Array (VLBA) Calibrator Survey (VCS;
Beasley+ 2002, J/ApJS/141/13; Fomalont+ 2003, J/AJ/126/2562; Petrov+
2005, J/AJ/129/1163, 2006, J/AJ/131/1872; Kovalev+ 2007, J/AJ/133/1236).
Flux densities of 2045 of 2503 sources were simultaneously measured by
single-dish observations in the K (21.7GHz) and Q (42.4GHz) bands
using the Korean VLBI Network (KVN) Yonsei and Ulsan radio telescopes
from 2009 December to 2011 March.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 98 1848 The Korean VLBI Network Calibrator Survey (KVNCS)
catalog
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See also:
I/323 : International Celestial Reference Frame 2, ICRF2 (Ma+, 2009)
I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997)
J/MNRAS/426/2107 : KNoWS pilot bright sample (Righini+, 2012)
J/AJ/143/35 : KCAL VERA 22 GHz calibrator survey (Petrov+, 2012)
J/MNRAS/419/1097 : The EVN Galactic Plane Survey - EGaPS (Petrov, 2012)
J/AJ/142/35 : The VLBA Galactic Plane Survey (VGaPS) (Petrov+, 2011)
J/A+A/526/A102 : VLBI imaging of extragalactic radio sources (Bourda+, 2011)
J/A+A/520/A113 : VLBI detection of extragalactic radio sources (Bourda+, 2010)
J/AJ/139/1713 : Celestial Reference Frame at 24 and 43GHz. II (Charlot+, 2010)
J/AJ/139/1695 : Celestial Reference Frame at 24 and 43 GHz (Lanyi+, 2010)
J/MNRAS/402/2403 : Australia Telescope 20GHz Survey Catalog (Murphy+, 2010)
J/ApJ/694/222 : Extragalactic point sources in WMAP 5-yr maps (Chen+, 2009)
J/AJ/136/580 : Sixth VLBA calibrator survey: VCS6 (Petrov+, 2008)
J/AJ/133/2487 : VERA 22GHz Fringe Search Survey (Petrov+, 2007)
J/AJ/133/1236 : Fifth VLBA calibrator survey: VCS5 (Kovalev+, 2007)
J/AJ/131/1872 : Fourth VLBA calibrator survey: VCS4 (Petrov+, 2006)
J/AJ/129/1163 : Third VLBA calibrator survey: VCS3 (Petrov+, 2005)
J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004)
J/AJ/126/2562 : Second VLBA calibrator survey: VCS2 (Fomalont+, 2003)
J/ApJS/141/13 : VLBA calibrator survey: VCS1 catalog (Beasley+, 2002)
J/ApJS/126/133 : The FIRST bright quasar survey. II. (White+, 2000)
J/A+A/342/378 : 6 and 20cm flux densities of radio galaxies (Gurvits+ 1999)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name IAU identifier (JHHMM+DDMM)
12- 19 A8 --- IVS IVS identifier (HHMM+DDd; B1950 or other IDs)
21- 22 I2 h RAh VCS1-5 Hour of Right Ascension (J2000) (1)
24- 25 I2 min RAm VCS1-5 Minute of Right Ascension (J2000)
27- 31 F5.2 s RAs VCS1-5 Second of Right Ascension (J2000)
33 A1 --- DE- Sign of the VCS1-5 Declination (J2000) (1)
34- 35 I2 deg DEd VCS1-5 Degree of Declination (J2000) (1)
37- 38 I2 arcmin DEm VCS1-5 Arcminute of Declination (J2000)
40- 44 F5.2 arcsec DEs VCS1-5 Arcsecond of Declination (J2000)
46- 55 A10 --- Code22 K band observation code identifier
57- 61 F5.2 --- Flux22 [0.07/26.3]? KVN K band (22 GHz) flux density
63- 66 F4.2 --- e_Flux22 [0.01/2]? Uncertainty in Flux22
68- 77 A10 --- Code43 Q band observation code identifier
79- 83 F5.2 --- Flux43 [0.1/24.3]? KVN Q band (43 GHz) flux density
85- 88 F4.2 --- e_Flux43 [0.03/5]? Uncertainty in Flux43
90- 95 F6.4 --- z [0.004/4.6]? Redshift from NED or SDSS-DR13
97- 98 A2 --- r_z Source flag on z (2)
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Note (1): VLBA calibrator survey (VCS):
VCS1 = Beasley+, 2002, J/ApJS/141/13
VCS2 = Fomalont+, 2003, J/AJ/126/2562
VCS3 = Petrov+, 2005, J/AJ/129/1163
VCS4 = Petrov+, 2006, J/AJ/131/1872
VCS5 = Kovalev+, 2007, J/AJ/133/1236
Note (2): Redshift source as follows:
* = These redshifts are taken from SDSS DR13.
d = The z-flag of these sources in NED are PHOT which means the
photometric redshift.
dd = The z-flag of these sources in NED are UNCERTAIN which means the
uncertain redshift.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 13-Apr-2017