Gravitationally lensed quasars in Pan-STARRS1 Virtual Observatory Resource

Authors
  1. Rusu C.E.
  2. Berghea C.T.
  3. Fassnacht C.D.
  4. More A.
  5. Seman E.
  6. Nelson G.J.,Chen G.C.-F.
  7. Published by
    CDS
Abstract

We present results of a systematic search for gravitationally lensed quasars in Pan-STARRS1. Our final sample of candidates comprises of 91 systems, not including 25 rediscovered lensed quasars and quasar pairs. In the absence of spectroscopy to verify the lensing nature of the candidates, the main sources of contaminants are likely to be quasar pairs, which we consider to be a byproduct of our work, and a smaller number of quasar + star associations. Among the independently discovered quads is 2M1134-2103, for which we obtained spectroscopy for the first time, finding a redshift of 2.77 for the quasar. There is evidence for microlensing in at least one image. We perform detailed mass modelling of this system using archival imaging data, and find that the unusually large shear responsible for the diamond-like configuration can be attributed mainly to a faint companion ~4arcsec away, and to a galaxy group/cluster ~30arcsec away. We also set limits of z~0.5-1.5 on the redshift of the lensing galaxy, based on its brightness, the image separation of the lensed images, and an analysis of the observed photometric flux ratios.

Keywords
  1. Gravitational lensing
  2. Quasars
  3. Optical astronomy
Bibliographic source Bibcode
2019MNRAS.486.4987R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/486/4987
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/486/4987

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/486/4987
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/486/4987
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/486/4987
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/MNRAS/486/4987/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/486/4987/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/486/4987/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/486/4987/tableb1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/486/4987/tableb1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/486/4987/tableb1?

History

2022-12-13T12:38:51Z
Resource record created
2022-12-13T12:38:51Z
Created
2023-10-02T07:49:08Z
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