The VLBA Galactic Plane Survey (VGaPS) Virtual Observatory Resource

Authors
  1. Petrov L.
  2. Kovalev Y.Y.
  3. Fomalont E.B.
  4. Gordon D.
  5. Published by
    CDS
Abstract

We presents accurate absolute positions from a 24 GHz Very Long Baseline Array (VLBA) search for compact extragalactic sources in an area where the density of known calibrators with precise coordinates is low. The goals were to identify additional sources suitable for use as phase calibrators for galactic sources, determine their precise positions, and produce radio images. In order to achieve these goals, we developed a new software package, PIMA, for determining group delays from wide-band data with much lower detection limit. With the use of PIMA we have detected 327 sources out of 487 targets observed in three 24 hour VLBA experiments. Among the 327 detected objects, 176 are within 10 degrees of the Galactic plane. This VGaPS catalogue of source positions, plots of correlated flux density versus projected baseline length, contour plots, as well as weighted CLEAN images and calibrated visibility data in FITS format, are available on the Web at http://astrogeo.org/vgaps. Approximately one half of objects from the 24GHz catalogue were observed at dual band 8.6GHz and 2.3GHz experiments. Position differences at 24GHz versus 8.6/2.3GHz for all but two objects on average are strictly within reported uncertainties. We found that for two objects with complex structure positions at different frequencies correspond to different components of a source.

Keywords
  1. astrometry
  2. very-long-baseline-interferometry
  3. optical-observation
  4. catalogs
  5. radio-sources
Bibliographic source Bibcode
2011AJ....142...35P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/142/35
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/142/35
Document Object Identifer DOI
doi:10.26093/cds/vizier.51420035

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/142/35
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/142/35
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/142/35
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/142/35/table9?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/142/35/table9?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/142/35/table9?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/142/35/table10?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/142/35/table10?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/142/35/table10?

History

2011-06-29T07:32:51Z
Resource record created
2011-06-29T07:32:51Z
Created
2017-12-22T05:33:31Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr