Observation of Multiply Imaged Quasars with the 4-m ILMT
Talat Akhunov,
National University of Uzbekistan, Department of Astronomy and Astrophysics, 100174 Tashkent, Uzbekistan and Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Astronomicheskaya 33, 100052 Tashkent, Uzbekistan. Corresponding author: t.axunov@nuu.uz; akhunovtalat@gmail.com
Bhavya Ailawadhi,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India and Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, India
Ermanno Borra,
Department of Physics, Université Laval, 2325, rue de l’Université, Québec, G1V 0A6, Canada
Monalisa Dubey,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India and Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly, 243006, India
Naveen Dukiya,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India and Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly, 243006, India.
Jiuyang Fu,
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
Baldeep Grewal,
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
Paul Hickson,
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
Brajesh Kumar,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India
Kuntal Misra,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India
Vibhore Negi,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India and Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, India
Anna Pospieszalska-Surdej,
Institute of Astrophysics and Geophysics, University of Liège, Allée du 6 Août 19c, 4000, Liège, Belgium
Kumar Pranshu,
Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India and Department of Applied Optics and Photonics, University of Calcutta, Kolkata, 700106, India
Ethen Sun,
Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
Jean Surdej,
Institute of Astrophysics and Geophysics, University of Liège, Allée du 6 Août 19c, 4000 Liège, Belgium
Abstract
Gravitationally lensed quasars (GLQs) are known to potentially provide an independent way of determining the value of the Hubble-Lemaître parameter H0, to probe the dark matter content of lensing galaxies and to resolve tiny structures in distant active galactic nuclei. That is why multiply imaged quasars are one of the main drivers for a photometric monitoring with the 4-m International Liquid Mirror Telescope (ILMT). We would like to answer the following questions: how many multiply imaged quasars should we be able to detect with the ILMT? And how to derive accurate magnitudes of the GLQ images? Our estimation of the possible number of multiply imaged quasars is 15, although optimistic forecasts predict up to 50 of them. We propose to use the adaptive PSF fitting method for accurate flux measurements of the lensed images. During preliminary observations in spring 2022 we were able to detect the quadruply imaged quasar SDSS J1251+2935 in the i’ and r’ spectral bands.
Keywords : ILMT, photometry, quasars, SDSS J1251+2935
Pour citer cet article
Talat Akhunov, Bhavya Ailawadhi, Ermanno Borra, Monalisa Dubey, Naveen Dukiya, Jiuyang Fu, Baldeep Grewal, Paul Hickson, Brajesh Kumar, Kuntal Misra, Vibhore Negi, Anna Pospieszalska-Surdej, Kumar Pranshu, Ethen Sun & Jean Surdej, «Observation of Multiply Imaged Quasars with the 4-m ILMT», 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, 933-940 URL : https://popups.uliege.be/0037-9565/index.php?id=11929.
