[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
Akhunov T., Ailawadhi B., Borra E. 2024, Bulletin de la Société Royale des Sciences de Liège, 93, 933, Proceedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation
Bellm EC Kulkarni SR Graham MJ et al. Publ Astron Soc Pac 2018 131 2019PASP.131a8002B 10.1088/1538-3873/aaecbe 018002
Gibson BK Hickson P Mon Notices R Astron Soc 1992 258 543 1992MNRAS.258.543G 10.1093/mnras/258.3.543
Giorgini J., Yeomans D., Chamberlin A. et al. 1996, in Aas/Division for Planetary Sciences Meeting Abstracts# 28, Volume 28, pp. 25–04
Harris CR Millman KJ Van Der Walt SJ et al. Nature 2020 585 357 2020Natur.585.357H 10.1038/s41586-020-2649-2
Hickson P. 2019, in LPI Contributions, First International Orbital Debris Conference, Volume 2109, p. 6066
Hunter JD Comput Sci Eng 2007 9 90 10.1109/MCSE.2007.55
Joye W. A., Mandel E. 2003, in Astronomical Data Analysis Software and Systems XII, Volume 295, p. 489
Juric M Ivezic Z Lupton RH et al. Astron J Am Astron Soc 2002 124 1776
Magnier EA Chambers K Flewelling H et al. Astrophys J Suppl Ser 2020 251 3 2020ApJS.251..3M 10.3847/1538-4365/abb829
Pospieszalska-Surdej A., Ailawadhi B., Akhunov T. 2024, in Proceedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, Volume 93. Bulletin de la Société Royale des Sciences de Liège, pp. 941–947
Pranshu K., Ailawadhi B., Akhunov T. 2024, proceedings of the 3rd BINA Workshop on the Scientific Potential of the Indo-Belgian Cooperation, Volume 93. Bulletin de la Société Royale des Sciences de Liège, pp. 828–836
Pranshu K Misra K Ailawadhi B et al. Transient Name Serv Discov Rep 2024 2024–964 1 2024TNSTR.964..1P
Pranshu K Misra K Ailawadhi B et al. Mon Notices R Astron Soc 2025 538 133 2025MNRAS.538.133P 10.1093/mnras/staf206
Pravec P Harris AW Kušnirák P Galád A Hornoch K Icarus 2012 221 365 2012Icar.221.365P 10.1016/j.icarus.2012.07.026
Price-Whelan A. M., Sipőcz B., Günther H. et al. 2018, Astron J, 156, 123