Observation and Confirmation of Nine Strong Lensing Systems in Dark Energy Survey Year 1 Data
Abstract
We describe the observation and confirmation of \nbconfirmtext\ new strong gravitational lenses discovered in Year 1 data from the Dark Energy Survey (DES). We created candidate lists based on a) galaxy group and cluster samples and b) photometrically selected galaxy samples. We selected 46 candidates through visual inspection and then used the Gemini Multi-Object Spectrograph (GMOS) at the Gemini South telescope to acquire spectroscopic follow-up of 21 of these candidates. Through analysis of this spectroscopic follow-up data, we confirmed nine new lensing systems and rejected 2 candidates, but the analysis was inconclusive on 10 candidates. For each of the confirmed systems, we report measured spectroscopic properties, estimated \einsteinradiussub, and estimated enclosed masses. The sources that we targeted have an i-band surface brightness range of iSB ~ 22 - 24 mag arcsec^2 and a spectroscopic redshift range of zspec ~0.8 - 2.6. The lens galaxies have a photometric redshift range of zlens ~ 0.3 - 0.7. The lensing systems range in image-lens separation 2 - 9 arcsec and in enclosed mass 10^12 - 10^13 Msol.
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Cite
@article{arxiv.1911.02162,
title = {Observation and Confirmation of Nine Strong Lensing Systems in Dark Energy Survey Year 1 Data},
author = {B. Nord and E. Buckley-Geer and H. Lin and N. Kuropatkin and T. Collett and D. L. Tucker and H. T. Diehl and A. Agnello and A. Amara and T. M. C. Abbott and S. Allam and J. Annis and S. Avila and K. Bechtol and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and C. E. Cunha and L. N. da Costa and C. Davis and J. De Vicente and P. Doel and T. F. Eifler and A. E. Evrard and E. Fernandez and B. Flaugher and P. Fosalba and J. Frieman and J. Garcıa- Bellido and E. Gaztanaga and D. Gruen and R. A. Gruendl and G. Gutierrez and W. G. Hartley and D. L. Hollowood and K. Honscheid and B. Hoyle and D. J. James and K. Kuehn and N. Kuropatkin and O. Lahav and M. Lima and M. A. G. Maia and M. March and J. L. Marshall and P. Melchior and F. Menanteau and R. Miquel and A. A. Plazas and A. K. Romer and A. Roodman and E. S. Rykoff and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and I. Sevilla-Noarbe and M. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and Y. Zhang},
journal= {arXiv preprint arXiv:1911.02162},
year = {2020}
}