Observation and Confirmation of Six Strong Lensing Systems in The Dark Energy Survey Science Verification Data
Abstract
We report the observation and confirmation of the first group- and cluster-scale strong gravitational lensing systems found in Dark Energy Survey (DES) data. Through visual inspection of data from the Science Verification (SV) season, we identified 53 candidate systems. We then obtained spectroscopic follow-up of 21 candidates using the Gemini Multi-Object Spectrograph (GMOS) at the Gemini South telescope and the Inamori-Magellan Areal Camera and Spectrograph (IMACS) at the Magellan/Baade telescope. With this follow-up, we confirmed six candidates as gravitational lenses: Three of the systems are newly discovered, and the remaining three were previously known. Of the 21 observed candidates, the remaining 15 were either not detected in spectroscopic observations, were observed and did not exhibit continuum emission (or spectral features), or were ruled out as lensing systems. The confirmed sample consists of one group-scale and five galaxy cluster-scale lenses. The lensed sources range in redshift z ~ 0.80-3.2, and in i-band surface brightness i_{SB} ~ 23-25 mag/sq.-arcsec. (2" aperture). For each of the six systems, we estimate the Einstein radius and the enclosed mass, which have ranges ~ 5.0 - 8.6" and ~ 7.5 x 10^{12} - 6.4 x 10^{13} solar masses, respectively.
Keywords
Cite
@article{arxiv.1512.03062,
title = {Observation and Confirmation of Six Strong Lensing Systems in The Dark Energy Survey Science Verification Data},
author = {B. Nord and E. Buckley-Geer and H. Lin and H. T. Diehl and J. Helsby and N. Kuropatkin and A. Amara and T. Collett and S. Allam and G. Caminha and C. De Bom and S. Desai and H. Dúmet-Montoya and M. Elidaiana da S. Pereira and D. A. Finley and B. Flaugher and C. Furlanetto and H. Gaitsch and M. Gill and K. W. Merritt and A. More and D. Tucker and E. S. Rykoff and E. Rozo and F. B. Abdalla and A. Agnello and M. Auger and R. J. Brunner and M. Carrasco Kind and F. J. Castander and C. E. Cunha and L. N. da Costa and R. Foley and D. W. Gerdes and K. Glazebrook and J. Gschwend and W. Hartley and R. Kessler and D. Lagattuta and G. Lewis and M. A. G. Maia and M. Makler and F. Menanteau and A. Niernberg and D. Scolnic and J. D. Vieira and R. Gramillano and T. M. C. Abbott and M. Banerji and A. Benoit-Lévy and D. Brooks and D. L. Burke and D. Capozzi and A. Carnero Rosell and J. Carretero and C. B. D'Andrea and J. P. Dietrich and P. Doel and A. E. Evrard and J. Frieman and E. Gaztanaga and D. Gruen and K. Honscheid and D. J. James and K. Kuehn and T. S. Li and M. Lima and J. L. Marshall and P. Martini and P. Melchior and R. Miquel and E. Neilsen and R. C. Nichol and R. Ogando and A. A. Plazas and A. K. Romer and M. Sako and E. Sanchez and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and J. Thaler and A. R. Walker and W. Wester and Y. Zhang and the DES Collaboration},
journal= {arXiv preprint arXiv:1512.03062},
year = {2016}
}
Comments
17 pages, 7 figures, 4 tables; submitted to ApJ