J/AJ/143/35 KCAL VERA 22 GHz calibrator survey (Petrov+, 2012)
The KCAL VERA 22 GHz calibrator survey.
Petrov L., Honma M., Shibata S.M.
<Astron. J., 143, 35 (2012)>
=2012AJ....143...35P 2012AJ....143...35P
ADC_Keywords: VLBI ; Radio sources
Keywords: catalogs - surveys - interferometry
Abstract:
We observed at 22GHz with the VLBI array VERA a sample of 1536
sources with correlated flux densities brighter than 200mJy at 8GHz.
One half of target sources has been detected. The detection limit was
around 200mJy. We derived the correlated flux densities of 877
detected sources in three ranges of projected baseline lengths. The
objective of these observations was to determine the suitability of
given sources as phase calibrators for dual-beam and phase-referencing
observations at high frequencies. Preliminary results indicate that
the number of compact extragalactic sources at 22GHz brighter than a
given correlated flux density level is twice less than at 8GHz.
Description:
The KCAL catalog presents correlated flux densities of 877 sources at
declination >-30° at 22GHz at three ranges of baseline projection
lengths (in Mλ = mega wavelengths):
1) [0, 70]; 2) [70, 100]; 3) [109, 150]
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 92 877 KCAL catalog of correlated flux densities
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See also:
J/A+A/445/465 : ACTA 18.5 and 22GHz fluxes of Kuehr 5GHz sample (Ricci+, 2006)
J/AJ/133/2487 : VERA 22GHz Fringe Search Survey (Petrov+, 2007)
J/AJ/142/89 : VLBA Galactic Plane Survey. VGaPS (Petrov+, 2011)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IAU IAU source J2000 name
12- 19 A8 --- IVS IVS (International VLBI Service) name (B1950)
21 A1 --- n_IVS [TC] Target source or amplitude Calibrator
23 I1 --- NExp Number of experiments source has been observed
25- 26 I2 --- Nobs Number of observations source has been detected
28- 33 F6.3 Jy F70 ?=-1 Median correlated flux density at baseline
projection lengths <70Mλ
35- 40 F6.3 Jy F70-100 ?=-1 Median correlated flux density at baseline
projection lengths 70-100Mλ
42- 47 F6.3 Jy F100 ?=-1 Median correlated flux density at baseline
projection lengths >100Mλ
49- 54 F6.3 Jy e_F70 ?=-1 Mean error in F70
56- 61 F6.3 Jy e_F70-100 ?=-1 Mean error in F70-100
63- 68 F6.3 Jy e_F100 ?=-1 Mean error in F100
70- 71 I2 h RAh Hours of Right Ascension (J2000)
73- 74 I2 min RAm Minutes of Right Ascension (J2000)
76- 80 F5.2 s RAs Seconds of Right Ascension (J2000)
82 A1 --- DE- Sign of the Declination (J2000)
83- 84 I2 deg DEd Degrees of Declination (J2000)
86- 87 I2 arcmin DEm Arcminutes of Declination (J2000)
89- 92 F4.1 arcsec DEs Arcseconds of Declination (J2000)
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Acknowledgements:
Leonid Petrov, Leonid.Petrov(at)lpetrov.net
(End) Patricia Vannier [CDS] 02-Mar-2012