Magellanic Quasars Survey. II. AGNs behind LMC Virtual Observatory Resource

Authors
  1. Kozlowski S.
  2. Kochanek C.S.
  3. Jacyszyn A.M.
  4. Udalski A.
  5. Szymanski M.K.,Poleski R.
  6. Kubiak M.
  7. Soszynski I.
  8. Pietrzynski G.
  9. Wyrzykowski L.,Ulaczyk K.
  10. Pietrukowicz P.
  11. Published by
    CDS
Abstract

We quadruple the number of quasars known behind the Large Magellanic Cloud (LMC) from 56 (42 in the Optical Gravitational Lensing Experiment (OGLE)-III LMC fields) to 200 by spectroscopically confirming 169 (144 new) quasars from a sample of 845 observed candidates in four ~3 deg^2^ Anglo-Australian Telescope/AAOmega fields south of the LMC center. The candidates were selected based on their Spitzer mid-infrared colors, X-ray emission, and/or optical variability properties in the database of the OGLE microlensing survey. The contaminating sources can be divided into 115 young stellar objects (YSOs), 17 planetary nebulae (PNe), 39 Be and 24 blue stars, 68 red stars, and 12 objects classed as either YSO/PN or blue star/YSO. There are also 402 targets with either featureless spectra or too low signal-to-noise ratios for source classification. Our quasar sample is 50% (30%) complete at I = 18.6 mag (19.3 mag). The newly discovered active galactic nuclei (AGNs) provide many additional reference points for proper motion studies of the LMC, and the sample includes 10 bright AGNs (I < 18 mag) that are potentially suitable for absorption line studies. Their primary use, however, is for detailed studies of quasar variability, as they all have long-term, high cadence, continuously growing light curves from the microlensing surveys of the LMC. Completing the existing Magellanic Quasars Survey fields in the LMC and Small Magellanic Cloud should yield a sample of ~700 well-monitored AGNs, and expanding it to the larger regions covered by the OGLE-IV survey should yield a sample of ~3600 AGNs.

Keywords
  1. active-galactic-nuclei
  2. magellanic-clouds
  3. infrared-photometry
  4. visible-astronomy
  5. photometry
  6. redshifted
  7. quasars
  8. surveys
Bibliographic source Bibcode
2012ApJ...746...27K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/746/27
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/746/27
Document Object Identifer DOI
doi:10.26093/cds/vizier.17460027

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/746/27
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/746/27
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/746/27
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/746/27/table5?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/746/27/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/746/27/table5?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/746/27/AGNs?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/746/27/AGNs?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/746/27/AGNs?

History

2013-09-12T12:26:00Z
Resource record created
2013-09-12T12:26:00Z
Created
2017-07-05T07:00:18Z
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