The KCAL VERA 22 GHz calibrator survey

Abstract

We observed at 22 GHz with the VLBI array VERA a sample of 1536 sources with correlated flux densities brighter than 200 mJy at 8 GHz. One half of target sources has been detected. The detection limit was around 200 mJy. 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 22 GHz brighter than a given correlated flux density level is twice less than at 8 GHz.

Accepted for publication by the Astronomical Journal. 6 pages, 3 figures, 3 table. The machine readable catalogue file, kcal_cat.txt can be extracted from the source of this submission

References in corpus (14)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The VLBA Imaging and Polarimetry Survey at 5 GHz
• The Sixth VLBA Calibrator Survey: VCS6
• The VLBA Galactic Plane Survey -- VGaPS
• The Australia Telescope 20GHz (AT20G) Survey: analysis of the extragalactic source sample
• The LBA Calibrator Survey of southern compact extragalactic radio sources - LCS1
• The VLBA Calibrator Search for the BeSSeL Survey
• VERA 22 GHz fringe search survey
• Precise absolute astrometry from the VLBA imaging and polarimetry survey at 5 GHz
• The catalogue of positions of optically bright extragalactic radio sources OBRS-1
• Astrometric suitability of optically-bright ICRF sources for the alignment with the future Gaia celestial reference frame
• Astrometry of Galactic Star-Forming Region Onsala 1 with VERA: Estimation of Angular Velocity of Galactic Rotation at Sun
• The EVN Galactic Plane Survey - EGaPS
• Astrometry of Star Forming Region IRAS 05137+3919 in the far outer Galaxy

Cited by in corpus (11)

• Single-epoch VLBI imaging study of bright active galactic nuclei at 2 and 8 GHz
• The First VERA Astrometry Catalog
• Milky Way scattering properties and intrinsic sizes of active galactic nuclei cores probed by very long baseline interferometry surveys of compact extragalactic radio sources
• The wide-field VLBA calibrator survey -- WFCS
• Connecting X-ray absorption and 21cm neutral hydrogen absorption in obscured radio AGN
• GENJI Programme: Gamma-ray Emitting Notable AGN Monitoring by Japanese VLBI
• Radio-loud Quasars above Redshift 4: VLBI Imaging of an Extended Sample
• Early science with Korean VLBI network: the QCAL-1 43GHz calibrator survey
• VERA monitoring of the radio jet 3C 84 during 2007--2013: detection of non-linear motion
• Korean VLBI Network Calibrator Survey (KVNCS): 1. Source Catalog Of KVN Single Dish Flux Density Measurement In The K And Q Bands
• Annual parallax measurements of a semiregular variable star SV Pegasus with VERA