TNS Astronomical Transient Report No. 270775 [ 2025TNSTR3781....1X ]

Date Received (UTC): 2025-09-20 13:04:09
Date made public:
Sender: WFST_SN
Reporting Group: WFST     Discovery Data Source: WFST

Zelin Xu, Dezheng Meng, Ji-an Jiang, Weiyu Wu, Zhengyan Liu, Junhan Zhao, Ziqing Jia (USTC) on behalf of the WFST collaboration report/s the discovery of a new astronomical transient.

IAU Designation: AT 2025yby
Discoverer internal name: WFST250918pqkw
Coordinates (J2000): RA = 01:13:50.560 (18.460667) DEC = +01:12:30.21 (1.208392)
Discovery date: 2025-09-18 21:27:21.600 (JD=2460937.394)



Photometry

Discovery (first detection):
Discovery date: 2025-09-18 21:27:21.600
Flux: 21.26 ABMag
Filter: r-WFST
Instrument: WFST-WFC
Telescope: Wide Field Survey Telescope

Last non-detection:
Last non-detection date: 2025-09-17 21:48:58
Limiting flux: 22.68 ABMag
Filter: g-WFST
Instrument: WFST-WFC
Telescope: Wide Field Survey Telescope


Details of the new object can be viewed here: https://www.wis-tns.org/object/2025yby