Preprint

Astrometric and photometric calibrators for the 4-m International Liquid Mirror Telescope

Naveen DukiyaDepartment of Applied Physics , Mahatma Jyotiba Phule Rohilkhand University , Bareilly , 243006 , IndiaBhavya AilawadhiAryabhatta Research Institute of Observational sciencES (ARIES) , Manora Peak , Nainital , 263001 , IndiaTalat AkhunovNational University of Uzbekistan , Department of Astronomy and Astrophysics , 100174 Tashkent , UzbekistanE. F. BorraDepartment of Physics , Université Laval , 2325, rue de l'Université , Québec , G1V 0A6 , CanadaMonalisa DubeyAryabhatta Research Institute of Observational sciencES (ARIES) , Manora Peak , Nainital , 263001 , IndiaJiuyang FuDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road , Vancouver , BC V6T 1Z1 , CanadaBaldeep GrewalDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road , Vancouver , BC V6T 1Z1 , CanadaPaul HicksonDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road , Vancouver , BC V6T 1Z1 , CanadaBrajesh KumarAryabhatta Research Institute of Observational sciencES (ARIES) , Manora Peak , Nainital , 263001 , IndiaKuntal MisraAryabhatta Research Institute of Observational sciencES (ARIES) , Manora Peak , Nainital , 263001 , IndiaVibhore NegiAryabhatta Research Institute of Observational sciencES (ARIES) , Manora Peak , Nainital , 263001 , IndiaKumar PranshuDepartment of Applied Optics and Photonics , University of Calcutta , Kolkata , 700106 , IndiaEthen SunDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road , Vancouver , BC V6T 1Z1 , CanadaJean SurdejInstitute of Astrophysics and Geophysics , University of Liège , Allée du 6 Août 19c , 4000 Liège , Belgium

2023en

ABI

Annotatsiya

The International Liquid Mirror Telescope (ILMT) is a 4-meter class survey telescope. It achieved its first light on 29$^{\rm th}$ April 2022 and is now undergoing the commissioning phase. It scans the sky in a fixed \ang{;22;} wide strip centred at the declination of $+$\ang{29;21;41.4} and works in \emph{Time Delay Integration (TDI)} mode. We present a full catalog of sources in the ILMT strip derived by crossmatching \textit{Gaia} DR3 with SDSS DR17 and PanSTARRS-1 (PS1) to supplement the catalog with apparent magnitudes of these sources in $g, r$, and $i$ filters. These sources can serve as astrometric calibrators. The release of Gaia DR3 provides synthetic photometry in popular broadband photometric systems, including the SDSS $g, r$, and $i$ bands for $\sim$220 million sources across the sky. We have used this synthetic photometry to verify our crossmatching performance and, in turn, create a subset of the catalog with accurate photometric measurements from two reliable sources.

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DOI: 10.48550/arxiv.2311.05617

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