Gravitationally Lensed Quasars Virtual Observatory Resource

Authors
  1. Maoz D.
  2. Bahcall J.N.
  3. Schneider D.P.
  4. Bahcall N.A.
  5. Djorgovski S.,Gould A.
  6. Kirhakos S.
  7. Doxsey R.
  8. Meylan G.
  9. Yanny B.
  10. Published by
    CDS
Abstract

The Snapshot Survey was a search for cases of gravitational lensing among intrinsically-luminous, high-redshift quasars using the Hubble Space Telescope (HST) Planetary Camera (PC). The accompanying ASCII tables summarize the results of the survey. Introduction: The Snapshot Survey was a search for cases of gravitational lensing among intrinsically-luminous, high-redshift quasars using the Hubble Space Telescope (HST) Planetary Camera (PC). Bahcall et al. (1992a; hereafter Paper I) described the objectives of the survey, its mode of operation, the sample definition, and the initial results of a small sample. Maoz et al. (1992b, 1993a, 1993b hereafter Papers II, III, and IV) reported results from a progressively larger sample and compared the observed lensing frequency to existing theoretical models. The discovery of a possible sub-arcsecond lens system, the z=3.8 quasar 1208+1011, reported by Maoz et al. (1992a) and Magain et al. (1992), was followed by HST multi-color imaging and spectroscopy as described in Bahcall et al. (1992b) and in Bahcall et al. (1992c), respectively. Star counts based on the Snapshot Survey images are described in Gould, Bahcall, and Maoz (1993). For all objects in the Survey, finding charts and astrometric positions appear in Schneider et al. (1992). The accompanying tables, published in Paper IV, summarize the results of the Snapshot Survey for gravitationally lensed quasars. Table1a.dat combines the results from Papers II, III, and IV into one list ordered by R.A. These tables have more accurately measured quasar magnitudes, and minor corrections have been made in some of the entries listed in the tables in previous papers, so that the present list superseded previous data summaries. Table1b.dat lists the Paper I observations in the same format as table1a.dat. Some of the exposures are only 120s (program 3034) and about half of the initial exposures were through the F785LP filter (similar to I), rather than the F555W filter. We have included in table1b.dat only quasars that were not subsequently re-observed. These files can be merged without repetition. Exposures through the F785LP filter are marked with an "I" in the V_obs column.

Keywords
  1. quasars
  2. gravitational-lensing
Bibliographic source Bibcode
1993ApJ...409...28M
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/409/28
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/409/28
Document Object Identifer DOI
doi:10.26093/cds/vizier.14090028

Access

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https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/409/28
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/409/28
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/409/28
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

1999-01-08T13:42:50Z
Resource record created
1999-01-08T12:42:54Z
Updated
1999-01-08T13:42:50Z
Created

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