NOAO >   Observing Info >   Approved Programs >   2017B-0138

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Program Information for 2017B-0138


PI: Tommaso Treu, UCLA, tt@astro.ucla.edu
Address: Physics Department, Physics and Astronomy Building, Los Angeles, CA 90095 USA

CoI: Adriano Agnello, ESO
CoI: Daniel Gilman, UCLA
CoI: Veronica Motta, Universidad de Valparaiso
CoI: Karina Rojas, Universidad de Valparaiso
CoI: Elizabeth Buckley-Geer, FNAL

Title: High-resolution imaging confirmation and follow-up of new lensed quasars

Abstract: Gravitationally lensed quasars are valuable probes of: (1) cosmological distances and the expansion history of the Universe; (2) the luminous and dark matter content in massive lens galaxies; (3) the co-evolution of quasars and their host galaxies; (4) inner structure of AGN. Progress in these fields has been limited chiefly by the paucity of known systems. For this reason, as STRIDES team we have selected from the DES/ATLAS/SDSS imaging datasets a large sample of new lensed quasar candidates in the Southern Hemisphere. Use of diverse techniques, from data mining to multi-band modelling, maximizes the number of high-grade candidates. From a final set of 149 candidates, we expect to confirm 25 new lensed quasars at worst, the rest being binary quasars – interesting astrophysical systems themselves – or quasar star pairs. The SOAR Adaptive Optics Module in $z^{prime}$ band is ideal to confirm the systems by detecting the lens galaxy between the QSO images (typically separated by $1-1.2''$), reject false positives, and go deep and sharp on confirmed lenses. Together with the companion 2017B request submitted by our Chilean collaborators, this proposal will allow us to complete follow-up of the entire sample, including the prime RA range for DES. This is a continuation of a successful program run during 2016A/B.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  SOAR/SAMI -- 3n on Dec 22 - Dec 24 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017B-0138

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