The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2016 follow-up campaign. II. New quasar lenses from double component fitting

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: Anguita, T., Schechter, P. L., Kuropatkin, N., Morgan, N. D., Ostrovski, F., Abramson, L. E., Agnello, A., Apostolovski, Y., Fassnacht, C. D., Hsueh, J. H., Motta, V., Rojas, K., Rusu, C. E., Treu, T., Williams, P., Auger, M., Buckley-Geer, E., Lin, H., McMahon, R. G., Abbott, T. M. C, Allam, S., Annis, J., Bernstein, R. A., Bertin, E., Brooks, D., Burke, D. L., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cunha, C. E., D'Andrea, C. B., De Vicente, J., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Flaugher, B., García-Bellido Capdevila, Juan, Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Hartley, W. G., Hollowood, D. L., Honscheid, K., James, D. J., Kuehn, K., Lima, M., Maia, M. A. G., Miquel, R., Plazas, A. A., Sánchez, E., Scarpine, V., Smith, M., Soares-Santos, M., Sobreira, F., Suchyta, E., Tarle, G., Walker, A. R.
• Other Authors: UAM. Departamento de Física Teórica, Instituto de Física Teórica (IFT)
• Format: Report
• Language: English
• Published: Oxford University Press on behalf of the Royal Astronomical Society 2019
• Subjects: Astrophysics of Galaxies (astro-ph.GA); Cosmology and Nongalactic Astrophysics (astro-ph.CO); Física; Kavli; sami
• Online Access: http://hdl.handle.net/10486/686735; https://doi.org/10.1093/mnras/sty2172

We report upon the follow up of 34 candidate lensed quasars found in the Dark Energy Survey using NTT-EFOSC, Magellan-IMACS, KECK-ESI and SOAR-SAMI. These candidates were selected by a combination of double component fitting, morphological assessment and color analysis. Most systems followed up are indeed composed of at least one quasar image and 13 with two or more quasar images: two lenses, four projected binaries and seven Nearly Identical Quasar Pairs (NIQs). The two systems confirmed as genuine gravitationally lensed quasars are one quadruple at zs=1.713 and one double at zs=1.515. Lens modeling of these two systems reveals that both systems require very little contribution from the environment to reproduce the image configuration. Nevertheless, small flux anomalies can be observed in one of the images of the quad. Further observations of 9 inconclusive systems (including 7 NIQs) will allow to confirm (or not) their gravitational lens nature. T. A. acknowledges support by proyecto FONDECYT 11130630 and by the Ministry for the Economy, Development, and Tourism's Programa Inicativa Científica Milenio through grant IC 12009, awarded to The Millennium Institute of Astrophysics (MAS). T.T. and V.M. acknowledge support by the Packard Foundation through a Packard Research Fellowship to T.T. T.T. acknowledges support by the National Science Foundation through grant AST-1450141. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora ...