Article (Scientific journals)
Performance of the 4-m International Liquid Mirror Telescope tested in two fields at high and low ecliptic and galactic latitudes
Filali, Sara; Pranshu, Kumar; Surdej, Jean et al.
2026In Journal of Astrophysics and Astronomy
Editorial reviewed
 

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Keywords :
astro-ph.EP; astro-ph.IM
Abstract :
[en] The 4-m International Liquid Mirror Telescope (ILMT) offers a unique opportunity to detect transients in a narrow strip of sky. We explore ILMT's potential to detect astrometric and photometric transients at various ecliptic and galactic latitudes. We inspected CCD frames observed at both low and high ecliptic and galactic latitudes during the commissioning phase and the November 2023 - May 2024 observation cycle, respectively. We analysed these images using both visual inspection and the ILMT's transient detection and candidate classification pipeline. In the low ecliptic and galactic latitude field, we detected more than 500 transient candidates. We cross-matched these with the Minor Planet Checker (MPC) database, identifying 504 catalogued asteroids, all with predicted V-magnitudes brighter than 24 mag, representing a total of 152 distinct asteroids. We performed the same steps on the high ecliptic and galactic latitude field, detecting 30 MPC-catalogued asteroids, and one newly discovered photometric transient, named AT 2024fxn. We present the positions, trajectories, and magnitudes of the detected asteroids observed in the SDSS g', r', and i' spectral bands and compare results from both fields. We explore the lightcurve of AT 2024fxn, which shows partial compatibility with a supernova (SN) hypothesis, while the data invites further insights.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Filali, Sara  ;  Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Pranshu, Kumar
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Hickson, Paul
Misra, Kuntal
Ailawadhi, Bhavya
Akhunov, Talat ;  Université de Liège - ULiège > Département de physique > Optique - Hololab
Dubey, Monalisa
Dukiya, Naveen
Kumar, Brajesh ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Space sciences, Technologies and Astrophysics Research (STAR)
Kumari, Priyanshi
Negi, Vibhore
Pospieszalska, Anna ;  Université de Liège - ULiège > Département de physique > Optique - Hololab
More authors (3 more) Less
Language :
English
Title :
Performance of the 4-m International Liquid Mirror Telescope tested in two fields at high and low ecliptic and galactic latitudes
Publication date :
2026
Journal title :
Journal of Astrophysics and Astronomy
ISSN :
0250-6335
Peer reviewed :
Editorial reviewed
Commentary :
To appear in the Journal of Astrophysics and Astronomy. 33 pages, 13 figures
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since 23 May 2026

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