PyLMT: A transient detection pipeline for the 4-m International Liquid Mirror Telescope

Convolutional Neural Network (CNN); Convolution; Transients; Asteroids; Variable stars; active galactic nuclei variability; telescope; surveys; machine learning

Abstract :

[en] The International Liquid Mirror Telescope (ILMT) is a 4-m aperture, zenith-pointing telescope with a field of view of 22⁠, situated in the foothills of the Himalayas. The telescope operates in continuous survey mode, making it a useful instrument for time-domain astronomy, particularly for detecting transients, variable stars, active galactic nuclei variability, and asteroids. This paper presents thePYLMT transient detection pipeline to detect such transient/varying sources in the ILMT images. The pipeline utilizes the image subtraction technique to compare a pair of images from the same field, identifying such sources in subtracted images with the help of convolutional neural network (CNN)-based real/bogus classifiers.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Pranshu, Kumar; Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India ; Department of Applied Optics and Photonics, University of Calcutta, Kolkata, 700106, India

Misra, Kuntal; Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India

Ailawadhi, Bhavya; Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India ; Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, India

Dubey, Monalisa; Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India ; Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly, 243006, India

Dukiya, Naveen; Aryabhatta Research Institute of Observational sciencES (ARIES), Manora Peak, Nainital, 263001, India ; Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University, Bareilly, 243006, India

Filali, Sara ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)

Hickson, Paul; Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada

Kumar, Brajesh; South-Western Institute for Astronomy Research, Yunnan University, Kunming, 650500, Yunnan, PR China

Negi, Vibhore; Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Pune, 411007, India

Surdej, Jean ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)

Language :

English

Title :

PyLMT: A transient detection pipeline for the 4-m International Liquid Mirror Telescope

Publication date :

March 2025

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Oxford University Press, Oxford, United Kingdom

Volume :

538

Pages :

133–152

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://arxiv.org/abs/2502.00556

Available on ORBi :

since 03 December 2024

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