TNS Astronomical Transient Report No. 271493 [ 2025TNSTR3873....1S ]

Date Received (UTC): 2025-09-26 23:33:52
Date made public:
Sender: Krzysztof Stanek
Reporting Group: ASAS-SN     Discovery Data Source: ASAS-SN

K. Z. Stanek, for the ASAS-SN team report/s the discovery of a new astronomical transient.

IAU Designation: SN 2025yrt
Discoverer internal name: ASASSN-25dw
Coordinates (J2000): RA = 05:07:55.238 (76.98016) DEC = -18:11:23.68 (-18.18991)
Discovery date: 2025-09-26 09:36:00.000 (JD=2460944.9)

Potential host galaxy: NGC 1781
Host redshift: 0.016645

Remarks: Present in several epochs, on the rise, possible nuclear source, so could also be a TDE

Photometry

Discovery (first detection):
Discovery date: 2025-09-26 09:36:00.000
Flux: 16.1 ABMag
Filter: g-Sloan
Instrument: Leavitt
Telescope: ASASSN-Leavitt

Last non-detection:
Last non-detection date: 2025-09-18 10:33:36
Limiting flux: 18.4 ABMag
Filter: g-Sloan
Instrument: Leavitt
Telescope: ASASSN-Leavitt


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