Publication

The gravitational lens system B1030+074. Discovery and follow-up.

Xanthopoulos, E., Browne, IWA., King, LJ., Jackson, NJ., Marlow, DR., Wilkinson, PN., Koopmans, LVE., Patnaik, AR. & Porcas, RW., 1999, ACTIVE GALACTIC NUCLEI AND RELATED PHENOMENA. Terzian, Y., Weedman, D. & Khachikian, E. (eds.). SAN FRANCISCO: ASTRONOMICAL SOC PACIFIC, p. 373-378 6 p. (IAU SYMPOSIA).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

  • E Xanthopoulos
  • IWA Browne
  • LJ King
  • NJ Jackson
  • DR Marlow
  • PN Wilkinson
  • LVE Koopmans
  • AR Patnaik
  • RW Porcas

We report the discovery of a new double image gravitational lens system B1030+074 which was found during the Jodrell Bank - VLA Astrometric Survey (JVAS). We have collected extensive radio data on the system using the VLA, MERLIN, the EVN and the VLBA as well as HST WFPC2 and NICMOS observations. The lensed images are separated by 1.56 arcseconds and their flux density ratio at centimetric wavelengths is approximately 14:1 although the ratio is slightly frequency dependent and the images appear to be time variable. The HST pictures show both the lensed images and the lensing galaxy close to the weaker image. The lensing galaxy has substructure which could be either part of the galaxy or a companion object. We have modeled B1030+074 using a Singular Isothermal Ellipsoid that yielded a time delay of 156/h(50) days. This lens is likely to be suitable for the measurement of the Hubble constant.

Original languageEnglish
Title of host publicationACTIVE GALACTIC NUCLEI AND RELATED PHENOMENA
EditorsY Terzian, D Weedman, E Khachikian
Place of PublicationSAN FRANCISCO
PublisherASTRONOMICAL SOC PACIFIC
Pages373-378
Number of pages6
ISBN (Print)1-58381-008-0
Publication statusPublished - 1999
Event194th Symposium of the International-Astronomical-Union - , Armenia
Duration: 17-Aug-199822-Aug-1998

Publication series

NameIAU SYMPOSIA
PublisherASTRONOMICAL SOC PACIFIC
ISSN (Print)0074-1809

Other

Other194th Symposium of the International-Astronomical-Union
CountryArmenia
Period17/08/199822/08/1998

Event

194th Symposium of the International-Astronomical-Union

17/08/199822/08/1998

Armenia

Event: Other

    Keywords

  • PHASE CALIBRATION SOURCES, INTERFEROMETER

ID: 4017508