The DELVE Quadruple Quasar Search I. A Lensed Low Luminosity AGN
Abstract
A quadruply lensed source, J125856.3-031944, has been discovered using the DELVE survey and WISE W1 - W2 colors. Followup direct imaging carried out with the Magellan Baade 6.5 m telescope is analyzed, as is spectroscopy from the 2.5 m Nordic Optical Telescope. The lensed image configuration is kite-like, with the major axis of the lensing galaxy along the symmetry axis of the kite, and with the faintest image at its tail. Redward of 6000 AA the tail image is strongly blended with the lensing galaxy. The Sloan g direct imaging carried out with Magellan permits deblending. As the lensed image configuration is nearly circular, simple models give high predicted magnifications for all four images. The source's narrow emission lines at redshift z=2.225 and low intrinsic luminosity qualify it as a Type 2 AGN. The Magellan image shows a substantial residual that suggests a second lensing galaxy.
Cite
@article{arxiv.2404.14256,
title = {The DELVE Quadruple Quasar Search I. A Lensed Low Luminosity AGN},
author = {Paul L. Schechter and Dominique Sluse and Erik A. Zaborowski and Alex Drlica-Wagner and Cameron Lemon and Frederic Dux and Frederic Courbin and Angela Hempel and Martin Millon and Tommaso Treu and Raul Teixeira and Monika Adamów and Clecio R. Bom and Julio A. Carballo-Bello and Peter S. Ferguson and Robert A. Gruendl and David J. James and Clara E. Martínez-Vásquez and Pol Massana and Sidney Mau and Burçin Mutlu-Pakdil and Noëlia E. D. Noël and Andrew B. Pace and Joanna D. Sakowska and Guy S. Stringfellow and Erik J. Tollerud and A. Katherina Vivas and Alfredo Zenteno},
journal= {arXiv preprint arXiv:2404.14256},
year = {2025}
}
Comments
Accepted for publication in AJ. New data, better model. See Fig. 3