DRAFT
2025-11-30 17:03:51
Type: Object/s-Discovery/Classification
Bibcode: 2025TNSAN.331....1M
WFST251129euxe (AT 2025afih): discovery of a fast optical transient at 80 Mpc
Authors: Dezheng Meng, Zelin Xu, Weiyu Wu, Junhan Zhao, Zhengyan Liu, Ziqing Jia, Ji-an Jiang (USTC) on behalf of the WFST collaboration
Source Group: WFST
Keywords: Time-domain, Surveys, Photometry, Transient, Supernova, Optical
Abstract:
We report a fast rising transient WFST251129euxe (AT 2025afih) discovered by the 2.5-m Wide Field Survey Telescope (WFST) through the Deep High-cadence ugr-band Survey.

WFST251129euxe (AT 2025afih) was detected by the 2.5-meter Wide Field Survey Telescope (WFST; Wang, T., et al., 2023, SCPMA, 6609512) Deep High-cadence ugr-band Survey ("DHugr," Jiang, J.-a., et al. in prep) on November 29, 2025. WFST251129euxe was first detected on MJD: 61008.73 at g = 20.83 ± 0.05 mag. The host is a nearby galaxy at ~80Mpc (host spec-z = 0.018993 from SIMBAD). A 5-sigma g-band non-detection of ~22.7 mag on Nov 28 indicates that the brightness of WFST251129euxe was increased by > 3.7 mag in g-band in the past two days.

Given the fast brightening of the nearby transient, follow-up observations are highly encouraged.

This report is based on observations obtained with the 2.5-m Wide Field Survey Telescope (WFST) at Mt. Saishiteng, Lenghu, China. The WFST science products have been made possible through the contributions of the University of Science and Technology of China (USTC) and the Purple Mountain Observatory (PMO).

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2025afih [WFST251129euxe] 02:03:03.912 +04:14:37.22 Z 413-33 0.018993 02:03:03.912 +04:14:37.24 SN Ia 0.019
AstroNote Publication Timestamp Title Authors
2024-230 2024-08-28 14:12:42 545 supernova candidates from the WFST pilot survey Ji-an Jiang (USTC), Zelin Xu (USTC), Weiyu Wu (USTC), Dezheng Meng (USTC), Zhengyan Liu (USTC), Junhan Zhao (USTC), Ziqing Jia (USTC), Xinzhi Li (USTC), Handan Li (USTC) on behalf of the WFST collaboration
2025-58 2025-02-13 14:14:05 330 supernova candidates from the first two months of the WFST deep high-cadence ugr-bands survey Ji-an Jiang, Zelin Xu, Dezheng Meng, Weiyu Wu, Zhengyan Liu, Junhan Zhao, Ziqing Jia, Handan Li, Xinzhi Li (USTC) on behalf of the WFST collaboration

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