GraL Spectroscopic Identification of Multiply Imaged Quasars
Priyanka Jalan,
Center for Theoretical Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland. Corresponding author: priyajalan14@gmail.com
Vibhore Negi,
Aryabhatta Research Institute of Observational Sciences, Nainital, Uttarakhand, India
Jean Surdej,
Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 19c, B-4000 Liège, Belgium
Céline Boehm,
School of Physics, The University of Sydney, NSW 2006, Australia
Ludovic Delchambre,
Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 19c, B-4000 Liège, Belgium
Jakob Sebastian den Brok,
Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
Dougal Dobie,
Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany
Andrew Drake,
Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1216 E. California Blvd., Pasadena, CA 91125, US
Christine Ducourant,
Laboratoire d’Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, B18N, allée Geoffroy Saint-Hilaire, 33615 Pessac, France
S. George Djorgovski,
Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1216 E. California Blvd., Pasadena, CA 91125, US
Laurent Galluccio,
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Boulevard de l’Observatoire, CS 34229, 06304 Nice, France
Matthew J. Graham,
Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1216 E. California Blvd., Pasadena, CA 91125, US
Jonas Klüter,
Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany and Department of Physics & Astronomy, Louisiana State University, 261 Nicholson Hall, Tower Dr., Baton Rouge, LA 70803-4001, US
Alberto Krone-Martins,
Donald Bren School of Information and Computer Sciences, University of California, Irvine, Irvine CA 92697, US and CENTRA, Faculdade de Cincias, Universidade de Lisboa, 1749-016, Lisbon, Portugal
Jean-François LeCampion,
Laboratoire d’Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, B18N, allée Geoffroy Saint-Hilaire, 33615 Pessac, France
Ashish A. Mahabal,
Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1216 E. California Blvd., Pasadena, CA 91125, US
François Mignard,
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Boulevard de l’Observatoire, CS 34229, 06304 Nice, France
Tara Murphy,
Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany
Anna Nierenberg,
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 264-789, Pasadena, CA 91109, USA
Sergio Scarano,
Departamento de Física - CCET, Universidade Federal de Sergipe, Rod. Marechal Rondon s/n, 49.100-000, Jardim Rosa Elze, São Cristóvão, SE, Brazil
Joseph Simon,
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 264-789, Pasadena, CA 91109, USA
Eric Slezak,
Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Boulevard de l’Observatoire, CS 34229, 06304 Nice, France
Dominique Sluse,
Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 19c, B-4000 Liège, Belgium
Carolina Spindola-Duarte,
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão, 1226, Cidade Universitária, 05508-900 São Paulo, SP, Brazil
Daniel Stern,
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 264-789, Pasadena, CA 91109, USA
Ramachrisna Teixera,
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão, 1226, Cidade Universitária, 05508-900 São Paulo, SP, Brazil
Joachim Wambsganss,
Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany and International Space Science Institute (ISSI), Hallerstraße 6, 3012 Bern, Switzerland
Abstract
Gravitational lensing is one of the most efficient tools for studying the Universe. However, spectral confirmation of such sources necessitates thorough calibration. This paper discusses the spectral extraction technique for the case where multiple source spectra are close to each other. Using the masking technique, we first identify high signal-to-noise (S/N) peaks in the CCD spectral image corresponding to the location of the source spectra. This technique calculates the cumulative signal via a weighted sum, providing a reliable approximation for the total counts contributed by each source spectrum. Subsequently, we proceed with the removal of the contaminating spectra. Through the application of this method, we confirm the nature of 11 candidate lensed quasars.
Keywords : Quasar, gravitational lensing, spectroscopy, multiply imaged quasars
Pour citer cet article
Priyanka Jalan, Vibhore Negi, Jean Surdej, Céline Boehm, Ludovic Delchambre, Jakob Sebastian den Brok, Dougal Dobie, Andrew Drake, Christine Ducourant, S. George Djorgovski, Laurent Galluccio, Matthew J. Graham, Jonas Klüter, Alberto Krone-Martins, Jean-François LeCampion, Ashish A. Mahabal, François Mignard, Tara Murphy, Anna Nierenberg, Sergio Scarano, Joseph Simon, Eric Slezak, Dominique Sluse, Carolina Spindola-Duarte, Daniel Stern, Ramachrisna Teixera & Joachim Wambsganss, «GraL Spectroscopic Identification of Multiply Imaged Quasars», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 93 - Année 2024, No 2 - Proceeedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, 752-765 URL : http://popups.ulg.be/0037-9565/index.php?id=11868.