Astrometry from VLBA Observations at 24 And 43 GHz

Abstract

Astrometric results are obtained from a collaboration formed to study extragalactic objects at radio frequencies between 20 and 50 GHz: The K-Q VLBI Survey Collaboration. We analyzed ten 24-hour observing sessions at the VLBA interferometer over a 5-yr period, including nearly three hundred radio sources. Our analysis indicates reduction in source structure effects on source positions relative to X-Band observations. The median formal uncertainties of right ascension and declination are 0.08 and 0.15 milliarcseconds, and the average absolute difference between the K-band (24 GHz) and the S-X estimated source positions are 0.17 and 0.23 milliarsceonds, respectively. These differences are partly due to absent or inadequate modeling of physical effects.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2008
Accession Number
ADA605603

Entities

People

  • Alan Fey
  • Barry Geldzahler
  • Charles Naudet
  • Chopo Ma
  • Christopher Jacobs
  • David Boboltz
  • David Gordon
  • Ed Fomalont
  • Gabor Lanyi
  • Patrick Charlot

Organizations

  • United States Naval Observatory

Tags

DTIC Thesaurus Topics

  • 5G Wireless Networks
  • Abstracts
  • Frequency
  • Frequency Bands
  • Information Operations
  • K Band
  • Observation
  • Observatories
  • Radio Frequency
  • Teamwork
  • X Band

Fields of Study

  • Physics

Readers

  • Astronomy/Astrophysics
  • Mathematics or Statistics