gravitational lensing: strong; methods: data analysis; cosmological parameters; Astrophysics - Cosmology and Nongalactic Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics
Abstract :
[en] We present six new time-delay measurements obtained from R[SUB]c[/SUB]-band monitoring data acquired at the Max Planck Institute for Astrophysics (MPIA) 2.2 m telescope at La Silla observatory between October 2016 and February 2020. The lensed quasars HE 0047-1756, WG 0214-2105, DES 0407-5006, 2M 1134-2103, PSJ 1606-2333, and DES 2325-5229 were observed almost daily at high signal-to-noise ratio to obtain high-quality light curves where we can record fast and small-amplitude variations of the quasars. We measured time delays between all pairs of multiple images with only one or two seasons of monitoring with the exception of the time delays relative to image D of PSJ 1606-2333. The most precise estimate was obtained for the delay between image A and image B of DES 0407-5006, where τ[SUB]AB[/SUB] = -128.4[SUB]-3.8[/SUB][SUP]+3.5[/SUP] d (2.8% precision) including systematics due to extrinsic variability in the light curves. For HE 0047-1756, we combined our high-cadence data with measurements from decade-long light curves from previous COSMOGRAIL campaigns, and reach a precision of 0.9 d on the final measurement. The present work demonstrates the feasibility of measuring time delays in lensed quasars in only one or two seasons, provided high signal-to-noise ratio data are obtained at a cadence close to daily. <P />All light curves presented in this paper are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr/">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/642/A193">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/642/A193</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Millon, M.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Courbin, F.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Bonvin, V.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Buckley-Geer, E.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL, 60510, USA ; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL, 60637, USA
Fassnacht, C. D.; Department of Physics, University of California, Davis, CA, 95616, USA
Frieman, J.; Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL, 60510, USA ; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL, 60637, USA
Marshall, P. J.; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA, 94035, USA
Suyu, S. H.; Max Planck Institute for Astrophysics, Karl-Schwarzschild-Strasse 1, 85740, Garching, Germany ; Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748, Garching, Germany ; Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei, 10617, Taiwan
Treu, T.; Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
Anguita, T.; Departamento de Ciencias Físicas, Universidad Andres Bello Fernandez Concha 700, Las Condes, Santiago, Chile ; Millennium Institute of Astrophysics, Chile
Motta, V.; Instituto de Física y Astronomía, Universidad de Valparaíso, Avda. Gran Bretaña 1111, Playa Ancha, Valparaíso, 2360102, Chile
Agnello, A.
Chan, J. H. H.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Chao, D. C.-Y.; Max Planck Institute for Astrophysics, Karl-Schwarzschild-Strasse 1, 85740, Garching, Germany ; Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748, Garching, Germany
Chijani, M.; Departamento de Ciencias Físicas, Universidad Andres Bello Fernandez Concha 700, Las Condes, Santiago, Chile
Gilman, D.; Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
Gilmore, K.; Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA, 94035, USA
Lemon, C.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Lucey, J. R.; Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham, DH1 3LE, UK
Melo, A.; Instituto de Física y Astronomía, Universidad de Valparaíso, Avda. Gran Bretaña 1111, Playa Ancha, Valparaíso, 2360102, Chile
Paic, E.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Rojas, K.; Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290, Versoix, Switzerland
Sluse, Dominique ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Williams, P. R.; Department of Physics and Astronomy, University of California, Los Angeles, CA, 90095, USA
Hempel, A.; Departamento de Ciencias Físicas, Universidad Andres Bello Fernandez Concha 700, Las Condes, Santiago, Chile ; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Kim, S.
Lachaume, R.; Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, 7820436, Santiago, Chile ; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Rabus, M.; Las Cumbres Observatory Global Telescope, 6740 Cortona Dr., Suite 102, Goleta, CA, 93111, USA ; Department of Physics, University of California, Santa Barbara, CA, 93106-9530, USA)
